Unit 1, Day 4

Agenda

1. Number talk: Which One Doesn’t Belong — four graphs, one parent
2. Random groups — one parent, many children: what does $\sqrt{x-2}$ do that $\sqrt{x}-2$ does not?
3. Gallery walk — every board holds a family portrait; find the family resemblance
4. Confirm your conjectures with sliders — Using Desmos
5. Debrief: Mistakes Are Data — the wrong graphs taught us the most

Things to do before our next class

• Stuck today? That was the design — read Getting Unstuck.
• Journal: the move that behaved backwards, and your best guess why.