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)

Highlight every input that appears more than once. If a highlighted input has different outputs, it is not a function.

For graphs, slide a ruler held vertically across the page. If it ever touches the graph twice, it is not a function.

Function means each input has ___ output.
Answer: exactly one.
Vertical line test fails means ___.
Answer: not a function.
Inputs are the ___.
Answer: domain.

🚀 Stretch it (got everything right)

Make a table that is NOT a function and explain why.
Answer: Any with a repeated input.
Give a real-world relationship that is a function and one that is not.
Answer: Any.