The video names the columns. This page is the machinery behind them: who does the taking, what instruction they are following, why the amount can move during a year, and what event finally decides whether it was right.
One action per lesson. Not a homework pile — one thing, small enough that it actually happens this week.
The expanded edition of this lesson's handout, sold separately: ten pages on this one lesson — the story, the worked math at three scales, the six what-ifs, the traps, and the deeper layer.
Digital edition · $9.99Paperback on Amazon · $24.99So far every dollar in this book arrived from somebody else. Next lesson: MAKE IT, SELL IT, STAND BEHIND IT — one table, 46 cups, one complaint, and the arithmetic underneath a thing you made yourself.