In simplest terms, we compare average student achievement gains in the same school under different principals. (educationnext.org)
If the future follows the patterns we have seen historically, the present value of achievement gains of this magnitude would be over $ 13 trillion. (educationnext.org)
Researchers found significant achievement gains for students in small kindergarten classes and additional gains in 1st grade, especially for black students. (ascd.org)