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Physics
107
Chemistry
44
Biology
45
Environment
24
Technology
4
Mathematics
128
Physics
Class 6
Make a torch: open and closed circuits
Electricity
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At rest or moving? It depends who is watching
Force and motion
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Reflection of light: the angle game
Light
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Shadows: near and far
Light
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Transparent, translucent or opaque?
Light
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Magnetic or non-magnetic?
Magnetism
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Density: build a liquid tower
Matter and its properties
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Mass and weight on Earth, the Moon and beyond
Measurement
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Measuring length with a ruler
Measurement
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Reading a measuring cylinder
Measurement
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Volume of odd-shaped objects by displacement
Measurement
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A fair test: which paper towel soaks up most?
Scientific learning
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Balancing a lever: the principle of moments
Simple machines
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Ramps: lifting a load the easy way
Simple machines
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Bottle music: high and low notes
Sound
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Class 7
Conductor or insulator?
Electricity
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Lighting a bulb: a simple circuit
Electricity
Too many plugs? Fuses and electrical safety
Electricity
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Force, mass and acceleration: the trolley run
Force and motion
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Friction on different surfaces
Force and motion
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A solar cooker: catching the Sun's heat
Heat
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Convection currents in water
Heat
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Which material conducts heat best? The wax bead race
Heat
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Images in a plane mirror
Light
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The pinhole camera: light travels in straight lines
Light
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Magnet poles: attract or repel?
Magnetism
Measuring average speed
Motion
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Safe or unsafe in the lab?
Scientific learning
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Pulleys: direction, mechanical advantage and efficiency
Simple machines
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Pitch and loudness: the vibrating string
Sound
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Long days and short days: the tilted Earth
The Earth and space
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Phases of the Moon: from Aunsi to Purnima
The Earth and space
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Class 8
Series and parallel circuits
Electricity
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Measuring force with a spring balance
Force and motion
What can a force do? Shape and motion
Force and motion
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Reading a laboratory thermometer
Heat
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How many images? Two mirrors at an angle
Light
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Lenses on the optical bench
Light
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Refraction: tracing rays through a glass block
Light
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Build an electromagnet
Magnetism
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A bus pulling away: velocity and acceleration
Motion
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Air pressure from the Terai to Everest
Pressure
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Floating, sinking and upthrust
Pressure
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Pascal's principle: the hydraulic lift
Pressure
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Pressure: force and contact area
Pressure
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Shape and floating: the plasticine boat challenge
Pressure
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What changes a pendulum's swing?
Scientific study
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The three classes of lever
Simple machines
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Charging by rubbing
Some natural phenomena
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Echoes: measuring the speed of sound
Sound
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Sound through solids, liquids and gases
Sound
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A tour of the planets: years, gravity and your weight
The Earth and space
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Class 9
The electricity bill: units and cost
Electricity
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Micro-hydro: from falling water to electricity
Energy
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Momentum: two trolleys collide
Force and laws of motion
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Action and reaction: the balloon rocket
Force and motion
Inertia: the sudden stop
Force and motion
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Round the track: distance and displacement
Force and motion
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Radiation: black cans and shiny cans
Heat
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Concave, convex and plane mirrors
Light
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Magnetic fields: bar magnet and current-carrying wire
Magnetism
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Finding the density of solids
Measurement
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Motion graphs: distance-time and velocity-time
Motion
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Liquid pressure and depth
Pressure
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Reaction time: the falling ruler
Scientific study
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The well windlass: wheel and axle
Simple machines
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Star, planet, moon, constellation or galaxy?
Universe
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Potential and kinetic energy on a ramp
Work, energy and power
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Work done in lifting loads
Work, energy and power
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Class 10
The transformer: stepping voltage up and down
Current electricity and magnetism
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Electrical power and the electricity bill
Electricity
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Ohm's Law: current in a simple circuit
Electricity
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Parallel circuit: how the current divides
Electricity
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Resistance of a wire: length, thickness and metal
Electricity
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Free fall: dropping a ball from a tower
Force and motion
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Mixing hot and cold: the method of mixtures
Heat
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Specific heat capacity: why water heats up slowly
Heat
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Good netizen, risky habit or cyber crime?
Information and communication technology
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Apparent depth: why pools look shallow
Light
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Short sight, long sight and glasses
Light
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Total internal reflection and optical fibres
Light
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The lens formula: where the image forms
Light: refraction and lenses
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Electromagnetic induction: magnet and coil
Magnetism
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Motors and generators
Magnetism
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Archimedes' principle: upthrust and the liquid pushed aside
Pressure
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Variables and graphs: the bouncing ball
Scientific study
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Splitting white light with a prism
The human eye and the colourful world
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Universal gravitation: the inverse square law
The universe
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The wave equation in a ripple tank
Waves
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All classes
Charging a phone battery
Energy and technology
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Choosing a resistor for an LED
Energy and technology
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Solar panels on the roof
Energy and technology
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Comparing earthquakes
Our planet and sky
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How fast do satellites go?
Our planet and sky
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How long does light take?
Our planet and sky
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How long is my shadow?
Our planet and sky
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If the Earth were a football
Our planet and sky
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Fan car: suction, hovering and thrust
Physics of new inventions
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A rubber-band launcher
Science around us
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A toy parachute
Science around us
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Bicycle gears
Science around us
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Half-life of radioactive atoms
Science around us
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How far away was the lightning?
Science around us
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How loud is safe?
Science around us
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Keeping tea hot
Science around us
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Stopping a vehicle in time
Science around us
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Your weight in a lift
Science around us
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Chemistry
Class 6
Natural indicators: acids and bases
Acids, bases and salts
Fibres and fabrics: plant, animal or man-made?
Fibre to fabric
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Evaporation and condensation
Matter and its properties
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Particle model: solids, liquids and gases
Matter and its properties
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Physical or chemical change?
Physical and chemical changes
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Filtration: cleaning muddy water
Separation of mixtures
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Sedimentation and decantation: separating sand from water
Separation of mixtures
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Separating iron filings from sand with a magnet
Separation of mixtures
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Dissolving: how much can water hold?
Solutions and solubility
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What makes sugar dissolve faster?
Solutions and solubility
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Class 7
Signs of a chemical reaction
Chemical reactions
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What makes iron rust?
Chemical reactions
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Natural or synthetic?
Materials in daily life
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Getting salt back from a salt and sand mixture
Separation of mixtures
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Class 8
How acidic is it? The pH scale
Acids, bases and salts
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Air takes up space, can be squashed and expands
Air and gases
Testing for carbon dioxide with limewater
Air and gases
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Valency: building compound formulas
Atoms and molecules
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Electroplating a spoon
Chemical effects of electric current
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Combustion: what does a fire need?
Chemical reactions
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Class 9
Neutralisation: acid meets alkali
Acids, bases and salts
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What is air made of? Measuring the oxygen
Air and gases
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Counting particles: the mole
Atoms and molecules
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Forms of carbon: diamond, graphite and coal
Carbon and its compounds
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Is mass lost in a reaction?
Chemical reaction
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Reaction rate: the fizzy tablet race
Chemical reactions
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Solution, colloid or suspension?
Matter: mixtures
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How strong is the sharbat? Concentration of a solution
Matter: mixtures and solutions
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Which metal is most reactive?
Metals and non-metals
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Making hydrogen: metal and acid
Some gases
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Class 10
Making blue copper sulfate crystals
Acids, bases and salts
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Testing the properties of acids and bases
Acids, bases and salts
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Marble and acid: carbon dioxide and the rate of reaction
Chemical reaction
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Oxidation and reduction with copper
Chemical reactions
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The periodic table: s, p, d and f blocks
Classification of elements
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Electrolysis: splitting compounds with electricity
Electrochemistry
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How are metals extracted from their ores?
Metal and non-metal
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Hard and soft water: the soap test
Water and the environment
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All classes
Gas from baking soda and vinegar
Chemistry in the kitchen
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How much sugar dissolves?
Chemistry in the kitchen
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Keeping food from spoiling
Chemistry in the kitchen
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Making an egg float
Chemistry in the kitchen
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Why water boils cooler in the mountains
Chemistry in the kitchen
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Which fuel boils water best?
Energy and technology
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Biology
Class 6
Herbivore, carnivore or omnivore?
Animals
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The five groups of vertebrates
Animals
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A balanced plate for the day
Food and nutrition
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Testing foods for starch, protein and fat
Food and nutrition
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Breathing and heartbeat: at rest and after exercise
Life processes
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Flowering or non-flowering plant?
Plants
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How do roots grow best?
Plants
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What do seeds need to germinate?
Plants
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Class 7
Animals without a backbone
Animals
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Which body system is it?
Human body
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How does water travel up a stem?
Plants
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Photosynthesis: counting oxygen bubbles
Plants
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Transpiration: how plants lose water
Plants
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New plants without seeds
Reproduction in plants
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Class 8
Using a microscope: magnification
Cells
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The five kingdoms of living things
Classification
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Kharif, rabi or zaid? Crops through the year
Crop production
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Roots and water absorption
Plants
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Eggs or live young?
Reproduction in animals
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Class 9
Diffusion of food colouring
Cells
Open now
Osmosis in potato strips
Cells
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Scientific names: genus and species
Classification
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Evidence of evolution: fossils, homologous and vestigial organs
Evolution
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How we breathe: the bell-jar lung model
Human body
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Respiration in germinating seeds
Life processes
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Growing oyster mushrooms
Mushroom
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Which animal tissue is it?
Tissues
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Class 10
The plant kingdom: from algae to flowering plants
Classification
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Which way does the plant grow?
Control and coordination
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Natural selection: the peppered moth
Evolution
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Inheritance: Mendel's pea crosses
Heredity
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Inheriting blood groups
Heredity
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The life cycle of the honey bee
Honey bee
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Fission, budding, spores or fragmentation?
How do organisms reproduce?
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Enzymes: digesting starch with amylase
Human body
All classes
Body mass index
Our body and health
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Energy used in play
Our body and health
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First aid: helps or harms?
Our body and health
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Herd immunity
Our body and health
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How fast do germs multiply?
Our body and health
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How much water should I drink?
Our body and health
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Inherited or acquired?
Our body and health
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Which nutrient is missing?
Our body and health
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Who can give blood to whom?
Our body and health
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How do seeds travel?
Science around us
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Environment
Class 6
Keeping a pond in balance
Ecosystems
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What is soil made of? The soil jar test
Soil
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How clean is our water? Testing water samples
Water and the environment
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Class 7
What makes things rot? Decomposition in sealed jars
Ecosystems
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The water cycle in a tank
Water and the environment
Reading weather records: South Asian cities
Weather and climate
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Class 8
Saving the one-horned rhino
Biodiversity
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Metallic or non-metallic mineral?
Minerals
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Coal, sunlight or forests: will it run out?
Natural resources
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Reading the air quality index
Pollution of air and water
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Which soil holds the most water?
Soil
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Making muddy river water safe to drink
Water and the environment
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Class 9
The energy pyramid: why food chains are short
Ecological balance
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Comparing biodiversity with quadrats
Ecosystems
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Class 10
Fertilisers, pesticides and the river
Agriculture and the environment
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The greenhouse effect in a jar
Climate change
Powering a hill village: solar, wind or micro-hydro?
Energy
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Soil erosion and how to prevent it
Natural resources
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Nepal's endangered wildlife and medicinal herbs
Nature and the environment
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All classes
Saving energy at home
Energy and technology
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Harvesting rain from a roof
Our planet and sky
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How much carbon do trees store?
Our planet and sky
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The carbon footprint of the school run
Our planet and sky
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What time is it there?
Our planet and sky
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Technology
Class 6
Input, output, processing or storage?
Computers
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Class 7
Binary numbers: how a computer counts with bulbs
Digital concepts
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Strong passwords: how long to guess?
Digital safety
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Class 8
How an ATM gives you money
Digital systems
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Mathematics
Class 6
Area and perimeter: fencing a kitchen garden
Area and perimeter
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Composite areas: a path round the lawn
Composite and shaded areas
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Coordinates: finding places on a village map
Coordinates
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Bar graphs: choosing a scale
Data handling
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Decimals and rounding: weighing rice at the shop
Decimals
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Equations on a tarazu: finding x
Equation and inequality
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HCF and LCM: buses and bamboo poles
Factors and multiples
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Fractions and percentages: sharing a birthday cake
Fractions and percentages
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Function machines: the momo shop and secret rules
Functions and rules
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Indices: powers of 2, 3, 5 and 10
Indices
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Integers on a number line: a cold morning in Jumla
Integers
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Acute, right, obtuse, straight or reflex?
Lines and angles
Converting units: the metric staircase
Measurement and unit conversion
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Prime time: the sieve of Eratosthenes
Numbers: primes and factors
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Number patterns: seating guests at a wedding feast
Patterns and sequences
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Angles of polygons: tiling a courtyard floor
Polygons
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Profit and loss at the school fair
Profit and loss
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Which quadrilateral is it?
Quadrilaterals
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Empty, singleton, finite or infinite set?
Sets
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Sets and Venn diagrams: the class sports survey
Sets and Venn diagrams
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Volume and surface area: designing a water tank
Solids: volume and surface area
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Speed, distance and time: Kathmandu to Pokhara
Speed, distance and time
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Symmetry: mirrors and turns
Symmetry
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Angles of a triangle: building a roof frame
Triangles and angles
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The unitary method: shopping at the kirana pasal
Unitary method
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Class 7
(a + b)² and (a − b)² with square tiles
Algebraic expressions
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Bearings and scale drawings: a map to the village
Bearing and scale drawing
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Circumference and area: the bicycle wheel
Circles
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Congruent, similar or neither?
Congruent figures
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Transformations on a grid: copying a rangoli motif
Coordinates and transformations
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Graphing inequalities on a number line
Equation, inequality and graph
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Laws of indices: add, subtract or multiply
Indices
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Multiplying integers: the lift in a building
Integers
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Solving equations: the shopkeeper's balance
Linear equations
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Parallel lines and angles: a road across two streets
Parallel lines and a transversal
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Volume and surface area of a box
Perimeter, area and volume
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Profit, loss and commission: selling oranges
Profit, loss and commission
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Ratio and proportion: mixing lemon sharbat
Ratio and proportion
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Rational numbers on a number line
Rational numbers
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Universal set and subsets: a Venn diagram
Sets
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Faces, vertices and edges of solids
Solid objects
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Squares and square roots: buying a square carpet
Squares and square roots
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Mean, median and mode: a vegetable stall's sales
Statistics
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Which tiles cover a floor? Polygon angles and tessellation
Symmetry and tessellation
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More workers, fewer days: inverse proportion
Unitary method
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Cubes and cube roots: building with unit cubes
Whole numbers
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Class 8
Factorisation with area tiles: extending a courtyard
Algebraic identities and factorisation
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Painting a room: the area of four walls
Area and volume
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Bearing and back bearing: a trek to the village
Bearing and scale drawing
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Circles: the perpendicular that halves a chord
Circles
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Reflection, rotation and translation of a point
Coordinates and transformation
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Laws of indices: folding a sheet of paper
Indices
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Simple and compound interest: saving in a cooperative
Interest and depreciation
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Linear graphs and simultaneous equations: which taxi is cheaper?
Linear equations and graphs
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Angles at parallel lines: a road crossing two canals
Lines and angles
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Binary and quinary: numbers in base 2 and base 5
Number systems
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Discount and VAT: shopping at the Dashain sale
Percentage: discount and VAT
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Pie charts: a family's monthly budget
Pie charts
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Pick a card: the chance of one event
Probability
Probability: the lucky-draw bag at the school mela
Probability
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Pythagoras and surds: a brace for the gate
Pythagoras' theorem and surds
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Rational or irrational?
Real numbers
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Sample spaces: rolling two dice
Sample spaces
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Scientific notation: from a virus to the Sun
Scientific notation
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Equal, subset, overlapping or disjoint sets?
Sets
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Histograms: grouping a class's marks
Statistics
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The exterior angle of a triangle
Triangles
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Work and time: filling the water tank
Work and time
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Class 9
Arcs and sectors: the garden sprinkler
Arcs and sectors
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Area of paths crossing a garden
Area
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Circle theorems: photographing the park gate
Circle theorems
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Shares and dividends: cash and bonus
Commission and dividend
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Currency exchange: at the bank counter
Currency exchange
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Grouped data and histograms: heights in our class
Grouped data
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Household arithmetic: the electricity bill
Household arithmetic
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Logarithms: how many times to multiply
Indices and logarithms
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Simultaneous equations: where two lines meet
Linear equations
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Mean, median and mode from a frequency table
Measures of central tendency
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Heron's formula: the area of a field from its sides
Mensuration
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The remainder and factor theorems
Polynomials
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Take some cards out: a smaller pack
Probability
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This card or that one? The addition rule
Probability
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Combined events: two traffic lights on the way to school
Probability of combined events
Quadratic equations: will the fountain reach the balcony?
Quadratic equations and graphs
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The mid-point theorem
Quadrilaterals and triangles
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Sequences and series: seats in a hall
Sequence and series
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Union, intersection and difference: a sports survey
Sets
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Similar triangles: measuring with shadows
Similarity
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Prisms: the volume and canvas of a tent
Solid figures
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Income tax on slabs: a year's salary
Taxation
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SSS, SAS, ASA, RHS or not enough?
Triangles
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Sine, cosine and tangent: a ladder against a wall
Trigonometric ratios
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Heights and distances: measuring a temple tower
Trigonometry: heights and distances
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Cylinders, cones and spheres: pouring into a drum
Volume and surface area of solids
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Class 10
Combined solids: a circus tent
Area and volume
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Pyramids: volume and surface area
Area and volume
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Cyclic quadrilaterals: opposite angles
Circle
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Tangents from a point to a circle
Circle
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Compound interest: yearly, half-yearly or quarterly
Compound interest
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Distance and section formulas on a grid
Coordinate geometry
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Exchange rates: devaluation and revaluation
Currency and exchange
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Zeroes and coefficients of a quadratic
Polynomials
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Population growth and depreciation
Population growth and depreciation
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Probability trees: independent events
Probability
Two cards in a row: putting back or keeping out
Probability of combined events
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Quadratic equations: the formula and the parabola
Quadratic equations
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Euclid's division: finding the HCF
Real numbers
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Arithmetic and geometric progressions
Sequence and series
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Three sets: a survey of newspapers read
Sets
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Mean of grouped data
Statistics
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Quartiles from an ogive
Statistics
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Triangles and parallelograms on the same base
Triangles and quadrilaterals
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The basic proportionality theorem
Triangles: similarity
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Area of a triangle: ½ab sin C
Trigonometry
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Height and distance: two angles of elevation
Trigonometry
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sin²θ + cos²θ = 1 on a unit circle
Trigonometry
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All classes
A spinner game
Maths in everyday life
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Batting average and strike rate
Maths in everyday life
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Cooking for more people
Maths in everyday life
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Fibonacci and the golden ratio
Maths in everyday life
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How many handshakes?
Maths in everyday life
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Pascal's triangle
Maths in everyday life
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Paying back a loan
Maths in everyday life
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Symmetry in everyday shapes
Maths in everyday life
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The angle between the clock hands
Maths in everyday life
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The birthday surprise
Maths in everyday life
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Triangular numbers with dots
Maths in everyday life
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Which unit would you use?
Maths in everyday life
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