All practice pages/Measurement and units
Kilo, milli, micro and the rest. Flashcards until they are automatic, then a quiz that makes you use them.
A prefix multiplies a unit by a power of ten: 1 km is 10³ m, 1 µg is 10⁻⁶ g. The same thirteen prefixes work on every unit. Cards you miss come back sooner; cards you know drift to the back.
Capital letters matter: M is mega (a million) and m is milli (a thousandth). Micro is the Greek letter mu, µ; when you cannot type it, u is accepted here.