*Point $Q$ is in the interior of $\angle ROS$. $m\angle ROQ=21°$ and $m\angle SOQ=51°$. Draw a picture. Use that picture to help find $m\angle ROS$.*

During the quiz, at least half the class drew me over to ask about the problem. I counseled them, "What does 'interior' mean? Follow the instructions." Later on, I was grading their quizzes and saw that they did quite well. After all their consternation, 13 out of 15 students got that question perfect. Students given a challenging problem will stick with it and rise to the occasion I think I'll keep challenging them like that.

Students quickly found the area of the small rectangles to be 108 square inches, but floundered finding the dimensions. They gave me any two numbers that multiplied to 108, failing to see the arrangement of the rectangles as a constraint on their dimensions. Students given a challenging problem will get stuck, get distracted, and give up. I wonder what went wrong this time.

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