Learn step by step

Each topic explains the idea, walks you through a solved example and warns you about the most typical mistake. Once it clicks, you practise.

Choose what you want to learn

Ages 10-12Adding and subtracting fractionsWhy you never add the bottom numbers Ages 11-13Multiplying fractionsThe easiest operation of them all Ages 11-13Dividing fractionsThe trick of flipping the second one Ages 9-11Adding and subtracting decimalsIt all comes down to lining up the point Ages 10-12Multiplying decimalsMultiply without points, count them at the end Ages 11-13Dividing decimalsShift the point and make it easy Ages 12-14PowersMultiplying many times without writing so much Ages 13-15Square and cube rootsThe power in reverse Ages 12-14Linear equationsFind the number hiding behind the x Grades 8-9Scientific notationWrite huge and tiny numbers without getting dizzy Grades 8-9Basic probabilityMeasure luck with math Grades 8-9Mean, median and modeThree ways to summarize a pile of data in one number Grade 10Sine, cosine and tangentThe three ratios that connect angles with sides Grade 10LogarithmsThe reverse question of powers