Coach: look at the exit check results and the paper practice. Go back over every item a student missed: read it together, have the student explain their thinking, then show the correct thinking. Use the reteach routine below for anyone who missed two or more. Students who got everything right take the stretch task.

🔄 Reteach it (missed two or more)

Use the "spaghetti line": lay a strand of spaghetti on the scatter plot so roughly half the points are above and half below, then write its equation from two points on it.

For every correlation claim, ask: "What else could cause both?" and list one lurking variable.

r near -1 means...
Answer: Strong negative linear relationship.
Residual = actual - ___.
Answer: predicted.
Correlation does not prove ___.
Answer: causation.

🚀 Stretch it (got everything right)

Collect 8 data pairs (arm span and height) and find a line of best fit.
Answer: Any.
Find a news headline that confuses correlation with causation and explain the error.
Answer: Any.