Ask how and why

The best test of whether students can get answers right consistently is whether they can explain how they got the answer.

Teacher: How far is it from Durango to Pueblo?


Student: Six hundred miles


Teacher: How’d you get that?


Student: By measuring three inches on the map and adding two hundred plus two hundred plus two hundred.


Teacher: How’d you know to use two hundred miles for each inch?               


Student: I looked at the scale in the map key.