HANDWASHING
five steps, and the 20 seconds that actually matter
IRREGULAR VERBS
the 100 you meet most: base · past · past participle — grouped by the four patterns, not shuffled alphabetically
LETTER TEAMS
40 letter combinations and the sounds they spell, in IPA, with one example word each
SIGHT WORDS
all 220 Dolch service words in five grade groups, Pre-K through third — with the top of the Fry frequency list up front
PASCAL’S TRIANGLE
the first thirteen rows, the sum of each row and the pattern of the odd numbers
ROMAN NUMERALS
seven symbols · ones, tens, hundreds · years
THE SOPRANO RECORDER
all 27 notes from C5 to D7 in the Baroque and German systems — and how to tell which one you hold
THE TEN CLOUD GENERA
three levels of the troposphere to one scale, and the ten genera that live in them
THE VERTICAL PLANET
from the Challenger Deep to the summit of Everest · one scale, nothing compressed
THE MOHS HARDNESS SCALE
ten reference minerals and five household probes: who scratches whom
THE PERIODIC TABLE
all 118 elements: symbol, atomic number and IUPAC atomic weight in every cell — blocks in colour, lanthanoids and actinoids offset below
ROCK CLASSIFICATION
the three classes, 24 named rocks and the cycle that links them — after USGS and NPS