What records were deleted?
We did not count students who were in classes of 10 or fewer or in schools of 100 or fewer. We also excluded about 5,000 students classified by the district as special education without a grade level. We dropped a few hundred records that failed to associate a teacher with a school or showed a teacher at two schools in the same year. Finally, we eliminated a small number of students who took only the English or only the math test but not the other.
