Learn maths visually, step by step
Most people who say they are "bad at maths" were simply never shown why the rules work. A formula written on a board is a conclusion; the understanding lives in the steps that lead to it. Know.it's maths lessons are built around those steps: equations are solved line by line on an animated worksheet, triangles are drawn and measured, and graphs grow as the numbers change, so you can see what each operation does.
Here you'll find our free maths explainers, from foundations like fractions, percentages and order of operations, through algebra, geometry and the Pythagorean theorem, to probability, statistics and calculus. There are also comparisons for easily confused ideas, like fractions vs decimals. Every card links to a short written answer. Visual lessons are optional requests using available credits or plan allowance.
You can also type any specific problem — "solve x² − 5x + 6 = 0" or "why is anything to the power zero equal to one?" — and get a lesson that works through that exact question. Lessons can be narrated in English, Hindi, Marathi, Tamil, Telugu, Hinglish and Minglish, depending on your plan and selected lesson options.
Popular maths lessons
Most-watched in the free Public Library
visualize double integral using cartesian plane in finding the centroid of an area
explain why does solving for centroid of an area requires double integral
calculus
What is an equation?
What is…? Maths explainers
Free written definitions, key facts and FAQs
What is the Pythagorean theorem?
What is algebra?
What is probability?
What is calculus?
What is a fraction?
What is a percentage?
What is statistics?
What is a logarithm?
What is game theory?
What is the order of operations (BODMAS/PEMDAS)?
What is geometry?
What is exponential growth?
How does it work? Maths step by step
The mechanism, one step at a time
How do bacteria multiply?
Maths comparisons
Commonly confused ideas, side by side
Fraction vs. Decimal: What's the Difference?
Fraction vs. Percentage: What's the Difference?
Ratio vs. Fraction: What's the Difference?
Scalar vs. Vector: What's the Difference?
Distance vs. Displacement: What's the Difference?
Key areas of maths
Where to start, and what each area covers.
Number sense and arithmetic
Fractions, decimals, percentages and ratios — the everyday maths behind discounts, recipes and marks.
Algebra
Using letters for unknowns, balancing equations and solving for x without guesswork.
Geometry and trigonometry
Shapes, angles and the Pythagorean theorem, drawn on screen so the proofs make sense.
Probability
How likely things are, why intuition often fails (hello, Monty Hall) and how to count possibilities.
Statistics
Mean, median, mode, standard deviation and the normal distribution — reading data without being fooled.
Calculus and growth
Rates of change, areas under curves and exponential growth, shown as motion rather than symbols.

