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Subjects and topics
Every topic on the platform, from the first grade to university courses. Open any topic to read the beginning of its lesson.
9 subjects · 1753 topics
Mathematics
Study of numbers, quantities, shapes, and patterns
Grade 1 34Grade 2 53Grade 3 39Grade 4 48Grade 5 57Grade 6 57Grade 7 86Grade 8 96Grade 9 127Grade 10 45Grade 11 59Grade 12 15SAT Reasoning Test Math section 69State Final Assessment Math (Grade 9) 25Algebra 120Basic physics 1
- Properties of objects: color, shape, size, material
- Sorting and Comparing Objects by Attributes
- Understanding Spatial Positions
- Number Recognition 1-10
- The Number Zero (0)
- Comparing Numbers within 10
- Addition within 10
- Subtraction within 10
Chemistry
Study of matter, its properties, and reactions
- Chemistry as a Science and Its Role in Everyday Life
- Chemical Laboratory Equipment and Safety
- Solids, Liquids, and Gases
- Changes of State
- Chemical Elements and the Periodic Table
- Atoms, Molecules, and Chemical Symbols
- Relative Atomic Mass
- Pure Substances and Mixtures
Biology
Study of living organisms and life processes
Grade 5 11Grade 6 10Grade 7 17Grade 8 24Grade 9 21Grade 10 18Grade 11 18Grade 12 18Molecular Biology 4DNA 7Immunology 5Bioinformatics 1Botany 8Zoology 15Medical English 2More topics 11
- Biology — The Science of Living Nature
- Methods of Studying Nature. Magnifying Instruments: The Magnifying Glass and the Microscope
- The Cell — The Basic Unit of Life
- Kingdoms of Life
- Plant Kingdom. What Does Botany Study?
- Fungi Kingdom
- Animal Kingdom
- Bacteria — Invisible Inhabitants of Earth
Physics
Study of matter, energy, and fundamental forces
Grade 1 1Grade 7 21Grade 8 22Grade 9 21Grade 10 24Grade 11 19Grade 12 18Basic physics 4Crystal Physics — From Symmetry to Properties 1
- What physics is
- What Physics Studies: Phenomena, Observation and Experiment
- Physical Quantities and Measurement; SI Units
- Matter: Molecules and the States of Matter
- Atomic Structure: Nucleus, Electrons and the Periodic Table
- Mechanical Motion: Trajectory, Path and Displacement
- Speed: Uniform and Non-Uniform Motion; Graphs
- Acceleration: Speeding Up and Slowing Down
Engineering
Design, build and test: mechanisms, structures, electronics and systems
Introduction to Engineering 10Electronics Fundamentals 12Arduino Uno - Beginner Level 9Raspberry Pi Pico - Beginner Level 9ESP32 - Beginner Level 9
- What Is Engineering?
- The Engineering Design Process
- Measurement, Units and Precision
- Forces and Loads: Tension, Compression, Shear and Torsion
- Materials and Their Properties
- Structures: Beams, Bridges and Trusses
- Energy and Power in Engineering
- Simple Machines: Levers, Pulleys, Gears and Inclined Planes
Artificial Intelligence
How machines learn from data: models, neural networks and their uses
Artificial Intelligence — Explorer Level 7Artificial Intelligence — Foundations 12Machine Learning Fundamentals 12Neural Networks & Deep Learning 10Generative AI & Large Language Models 10AI Ethics & Society 8
- Is AI a Person or a Helper?
- Spot the AI at Home
- AI or Just a Machine?
- Show Me Lots of Cats
- Good Examples, Bad Examples
- Guess the Next Word
- The Computer Guesses Too
- What Is Artificial Intelligence?
Computer Science
How computers work: data, algorithms, systems and networks
- Memory: Numbered Cells
- The Processor: A Small Set of Actions
- The Clock: One Action at a Time
- The Memory Ladder
- The Channel and Its Limit
- Everything Is a Number
- Meaning Lives in the Reading Agreement
- The Agreement Is Written at the Start
Language Arts
Reading, writing, speaking and listening
Programming
Writing code step by step: Python, C++, JavaScript, SQL and more
Grade 3 3Programming Foundations 25Python 23Python — Intermediate 26Python — Advanced 22C++ 20C++ — Intermediate 22C++ — Advanced 20Node.js 17Node.js — Intermediate 20Node.js — Advanced 19SQL 14SQL — Intermediate 14SQL — Advanced 13
- Why Learn to Code? What Programmers Do
- What Is a Computer?
- Computers Are Literal: Being Clear and Precise
- What Is a Program?
- What Is a Programming Language?
- Algorithms: Step-by-Step Thinking
- Sequencing and Program Flow
- Block-Based Coding: Your First Program Without Typing
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