Students in teacher Miguel Aguilar's fifth-grade class consistently make gains on standardized tests while next door, fifth graders who pass through teacher John Smith's class each year fall behind.

NPR: 'L.A. Times' Series Examines Teacher Ratings

Brooklyn resident Jinnie Spiegler says her fifth-grade daughter has been spending hours of class time on practice tests.

WSJ: Some NY parents to boycott new, harder state tests