Charts for school
These are the sheets a pupil needs within arm's reach rather than in a bag — the things looked up mid-problem, when going to find the textbook means losing the thread of the problem itself.
Arithmetic first: the times table and the hundred chart. Then notation — Roman numerals, the Greek alphabet as science actually uses it, and the SI prefixes. And two subject sheets: the basic physics formulas with every symbol and unit named, and the solar system with size, distance, year and day set out together.
Above a desk at home, or on a classroom wall. They print on ordinary A4 and A3 — meant to be replaced when they get scruffy, not framed.
VERTEBRATES
from lamprey to bird · and why "fish" and "reptiles" are not groups
SI BASE UNITS
seven constants given an exact number — and the seven units that follow from them
SI UNITS WITHOUT NAMES
the endless rest: assembled from the base and the named units, and never with a factor
SI DERIVED UNITS
twenty-two with names of their own — and what each one is made of
SI PREFIXES
from quetta to quecto · twenty multipliers