Reference Library

Science concepts, coding tools, and math from our lessons — explained with visuals, interactives, and code.

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Depth:
🔬

Science & Nature

(66)
🌈

Light & Color

Physics

Why the sky is blue, sunsets glow orange, and rainbows have seven bands.

🔊

Sound & Vibration

Physics

How vibrations become music, speech, and the roar of a river.

🚀

Forces & Motion

Physics

Newton's laws, gravity, friction, and why woodpeckers don't get headaches.

🏔️

Altitude & Atmosphere

Physics

Why mountains are cold, air thins with height, and the atmosphere has layers.

🌱

Plant Biology

Botany

How plants make food from sunlight, grow toward the sky, and reproduce.

🦇

Animal Senses & Behavior

Zoology

How animals see, hear, and sense the world in ways humans cannot.

🏞️

Rivers & Landforms

Geography

How rivers carve valleys, build deltas, and create the world's largest river island.

🌿

Ecology & Population Science

Ecology

How populations grow, ecosystems connect, and species survive — or don't.

🌧️

Weather & Climate

Meteorology

Monsoons, cyclones, and why Cherrapunji gets 12 meters of rain a year.

🧪

Materials & Chemistry

Materials Science

Silk proteins, clay minerals, bamboo composites — the chemistry of everyday materials.

Electricity & Current

Physics

How electrons flow, circuits work, and lightning strikes over the Brahmaputra.

🧲

Magnetism & Electromagnetism

Physics

From compass needles to electric motors — the invisible force that shapes technology.

🔍

Optics & Lenses

Physics

How lenses bend light to let us see the very small and the very far.

🌊

Waves & Wave Properties

Physics

From ocean waves to WiFi signals — the universal language of oscillation.

🌡️

Heat & Thermodynamics

Physics

Why tea cools, metals expand, and the monsoon drives weather across Assam.

💪

Energy & Work

Physics

The currency of the universe — from a falling mango to a hydroelectric dam.

🔬

Cell Structure & Function

Biology

The basic unit of life — every living thing from a tea leaf to a one-horned rhino is built from cells.

🧬

Genetics & DNA

Biology

The code of life — how DNA determines whether a seed becomes bamboo or a banyan.

🫀

Human Body Systems

Biology

How your heart pumps, lungs breathe, and brain thinks — the engineering inside you.

🧬

Evolution & Natural Selection

Zoology

How species change over millions of years — from ancient fish to Assam's one-horned rhino.

☢️

Nuclear Physics

Physics

Inside the atom's nucleus — fission, fusion, and the energy that powers stars.

🪐

Gravity & Orbits

Astronomy

The force that keeps the Moon in orbit and mangoes falling from trees.

💧

Fluid Mechanics

Physics

Why boats float, planes fly, and the Brahmaputra carves its path.

🚀

Relativity

Physics

Why nothing travels faster than light, and why time itself can slow down.

⚛️

Atoms & Atomic Structure

Chemistry

Everything you can touch is made of atoms — tiny, ancient, and indestructible.

⚗️

The Periodic Table

Chemistry

The map of all matter — 118 elements organized by their deepest properties.

⚗️

Chemical Bonding

Chemistry

Why atoms join together — the glue that builds molecules from salt to silk protein.

⚗️

Chemical Reactions

Chemistry

Atoms rearrange, bonds break and form — the transformations that cook food and rust iron.

🦠

Microbiology

Biology

The invisible world — bacteria, viruses, and fungi that shape health, soil, and fermentation.

🔬

Classification of Living Things

Zoology

How scientists organize millions of species — from five kingdoms to binomial naming.

🧬

Molecular Biology & Protein Synthesis

Biology

From gene to protein — how cells read DNA instructions and build the machinery of life.

🌿

Ecosystems & Biomes

Ecology

Energy flows, nutrients cycle, and biomes from Kaziranga grasslands to Himalayan alpine meadows.

⚗️

Acids, Bases & pH

Chemistry

The chemistry of sour lemons, soapy water, and the soil that grows Assam's tea.

⚗️

States of Matter & Gas Laws

Chemistry

Solid, liquid, gas — how temperature and pressure transform everything.

⚗️

Organic Chemistry Intro

Chemistry

Carbon's four bonds build the molecules of life — from methane to silk protein.

⚗️

Electrochemistry

Chemistry

Where chemistry meets electricity — batteries, corrosion, and electroplating.

🌍

Plate Tectonics & Earthquakes

Geology

The ground beneath your feet is moving — how continents drift and earthquakes shake.

🗺️

Maps, Coordinates & Navigation

Geography

From ancient star navigation to GPS satellites — how we find our place on Earth.

🌍

Climate & Climate Zones

Geography

Why Cherrapunji drowns in rain while Ladakh is a cold desert — Earth's climate engine.

🪨

Rocks, Minerals & Soil

Geology

The building blocks of Earth — from granite mountains to the red soil that grows Assam's tea.

🏙️

Population & Urbanization

Geography

How populations grow, migrate, and build cities — from Guwahati's boom to Ziro's quiet valleys.

🌍

Natural Resources & Sustainability

Geography

Forests, water, minerals, and energy — using Earth's gifts without using them up.

🌿

Food Webs & Energy Flow

Ecology

Who eats whom — how energy flows from sunlight through every living thing.

🌿

Habitats & Biomes

Ecology

From Kaziranga grasslands to Himalayan alpine meadows — where life thrives and why.

🌿

Symbiosis & Species Interactions

Ecology

Mutualism, parasitism, and competition — how species shape each other's lives.

🌿

Conservation Biology

Conservation

Protecting biodiversity — from Kaziranga's rhinos to the world's disappearing species.

🌿

Nutrient Cycles

Ecology

Carbon, nitrogen, water — the atoms that cycle endlessly through Earth's living systems.

🪐

The Solar System & Space

Astronomy

Eight planets, one star, and billions of mysteries — our cosmic neighborhood.

🍎

Human Health & Nutrition

Health & Medicine

What your body needs, how diseases spread, and why sleep matters more than you think.

⚙️

Simple Machines & Mechanical Advantage

Physics

Levers, pulleys, and inclined planes — the physics behind every tool humans ever built.

🌍

Environmental Science & Pollution

Conservation

Air, water, soil — how pollution affects ecosystems and what we can do about it.

🔬

The Scientific Method

Physics

How scientists ask questions, test ideas, and build knowledge — the engine of all discovery.

📈

Supply, Demand & Market Economics

Economics

Why prices change, how markets work, and the invisible forces behind every transaction.

🔧

Engineering Design Process

Engineering

How engineers solve problems — from defining the challenge to building, testing, and improving.

🎵

Music Theory & the Physics of Sound

Music & Arts

Pitch, rhythm, harmony, and the science hiding inside every song.

🥁

Rhythm, Beats & Percussion

Music & Arts

From your heartbeat to polyrhythms — the science of rhythm and how drums make sound.

🎨

Color Science & Visual Arts

Music & Arts

Why the sky is blue, how screens make every color from three, and the tricks artists use to create depth on a flat surface.

🔧

Machines, Motors & Mechanical Engineering

Engineering

Gears, engines, and the mechanical principles that move the world.

🏗️

Structural Engineering

Engineering

Why buildings don't fall down, bridges use triangles, and skyscrapers sway on purpose.

⚙️

Rotational Mechanics

Physics

Why wheels changed everything, figure skaters spin faster with arms in, and gears trade speed for force.

🦇

Sonar & Echolocation

Marine Science

How bats hunt in darkness, dolphins see with sound, and submarines navigate the deep.

🌊

Tides & Oceanography

Marine Science

Why the ocean breathes with the Moon, waves carry energy but not water, and coral reefs are underwater cities.

✈️

Aerodynamics & Flight

Engineering

Why birds soar, planes stay up, and skydivers stop accelerating.

🧠

Neuroscience & The Brain

Neuroscience

Your brain is an electrical storm — 86 billion neurons firing at lightning speed.

🌍

Geology & Earth Science

Geology

The ground under your feet is moving, mountains are growing, and rocks tell stories.

💧

Hydrology & Water Science

Marine Science

The same water dinosaurs drank is falling from your tap right now.

💻

Coding & Tools

(29)
🔢

Patterns in Nature

Mathematics

Fibonacci spirals, tessellations, fractals, and the hidden math in flowers and honeycombs.

📊

Algebra

Mathematics

The language of patterns — using letters to describe relationships that numbers alone cannot.

📐

Geometry Essentials

Mathematics

Shapes, angles, and spatial reasoning — from bamboo huts to bridge arches.

📐

Trigonometry

Mathematics

Triangles unlock the heights of mountains and the orbits of planets.

🎲

Probability & Combinatorics

Mathematics

The mathematics of chance — from coin flips to predicting monsoon rainfall.

📐

Coordinate Geometry

Mathematics

Where algebra meets geometry — equations become shapes on a plane.

📐

Number Theory & Sequences

Mathematics

Primes, factors, and the hidden patterns inside numbers themselves.

📐

Calculus

Mathematics

The mathematics of change — how slopes and areas reveal the rules behind motion.

📈

Statistics & Distributions

Mathematics

From averages to bell curves — the math that describes uncertainty and variation.

📐

Matrices & Vectors

Mathematics

Arrays of numbers that transform images, solve systems, and power machine learning.

📐

Ratios, Proportions & Percentages

Mathematics

The mathematics of comparison — from recipe scaling to population growth rates.

🐍

Python

Programming

The friendly language that reads like English

🌐

HTML / CSS / JavaScript

Programming

The three languages every website is built with

🔷

TypeScript

Programming

JavaScript with guardrails — catch bugs before your code runs

🔌

Arduino Language

Programming

C++ for microcontrollers — talk to the physical world

🔢

NumPy

Data Science

Fast math on arrays of numbers

📊

Matplotlib

Data Science

Turn numbers into charts and graphs

🤖

Machine Learning

AI & ML

Teach computers to learn from examples — not by writing rules, but by showing patterns.

🌊

Signals & Frequencies

Data Science

Understand the waves hidden in data

Circuits & Electronics

Electronics

The foundation of every electronic device

🖥️

Arduino Simulator

Electronics

Test circuits without physical hardware

📐

Statistical Thinking

Data Science

Sampling, confidence intervals, p-values, and the replication crisis — thinking critically about data.

〰️

Sine Waves

Mathematics

The building block of all waves

💻

Git & Version Control

Programming

Track every change, collaborate without chaos, and never lose your work again.

📊

Databases & SQL

Databases & SQL

Store, query, and organize data — the foundation of every app, website, and AI system.

💻

APIs & How the Web Works

Programming

How apps talk to each other — from weather data to social media to your favorite games.

💻

Algorithms & Data Structures

Programming

The recipes and containers of programming — how to organize data and solve problems efficiently.

⚙️

Cybersecurity Basics

Electronics

Passwords, encryption, and staying safe online — the digital self-defense every student needs.

Logic Gates & Boolean Algebra

Electronics

The building blocks of every computer — from simple switches to complex circuits.