BetterExplained
betterexplained.com
Math lessons built around intuition first and formulas second, with plain-language explanations of ideas like e, imaginary numbers, the Fourier transform and the Pythagorean theorem.
Why it is useful
Most maths teaching starts with the formula; this site starts with the insight. If a topic never quite clicked in school, the analogies and diagrams here are often what finally make it land. Free to read, with no account needed.
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