NBA Power Rankings: Knicks, Rockets rise toward top as we hand out second-quarter grades

The Thunder and Cavaliers continue to earn straight A's, while the Pelicans and Wizards may need to stay after school.

NBA Power Rankings: Knicks, Rockets rise toward top as we hand out second-quarter grades
The Thunder and Cavaliers continue to earn straight A's, while the Pelicans and Wizards may need to stay after school.