Science charts
The physics a school course asks for is a short list — a page of formulas, most of them one line long. What makes it hard is not the algebra but the bookkeeping: which symbol is which, what unit it carries, and which formula applies to the situation in front of you.
So the sheet is arranged by topic rather than alphabetically, every symbol is named, and every unit is stated. It is a reference for the desk during homework, not a substitute for the textbook.
It belongs above a desk or on a classroom wall — at the height where it gets read while working, rather than admired from the doorway.
WHAT A TORNADO BREAKS
twenty-eight damage indicators — and the wind at which each one gives way
TORQUE
why the same dumbbell grows heavier as the arm rises, and how to work it out in advance
ANIMALS
the main branches — from comb jellies to chordates · who is actually related to whom
THE TREE OF LIFE
who sits inside whom · where animals, fungi and plants actually are
VERTEBRATES
from lamprey to bird · and why "fish" and "reptiles" are not groups