You can see a sharp contrast between Shree Crawford and Cassie Thurman's sixth-grade science classes at A.R. Rucker Middle School.
In Crawford's class, the students sit quietly and work on assignments at their desk, while Thurman has her students moving around the room and talking aloud.
It's the same school. The same grade. The same class and the same curriculum. So you may ask: Why are the classes so different?
The answer lies in the gender.