SAM · Discrete trunk · leaf
A statement is true or false, a set is a collection with a membership test, and the two are the same idea written two ways.
Before this leaf: grid coordinates, arithmetic and Pythagoras.
This leaf feeds: Counting, Probability, Graphs.
Objects you will meet again: none.
One row per lesson, in the order the leaf builds up. Each lesson holds its notes, its demos and its challenges on one page. A demo link opens the lesson at that demo.
This leaf is planned. Its lessons are being designed now, and each one appears here when it is built. The strip above shows its planned length.
The vocabulary of every proof and every query; plates are toggles, truth tables and Venn regions. Reading and using logic only.
Every new word from this leaf appears here, with one sentence and the lesson that introduces it.
The sequencing for this leaf is published with its first lessons.