By 1999 almost two - thirds of all teachers in the 3rd and 8th grades reported spending more than 20 hours a year on test preparation. (educationnext.org)
Over two - thirds of the teachers said that the state assessment affected their instruction, even when students in their grades were not tested. (gse.harvard.edu)
On average, one - third of teachers leave the profession within five years. (governing.com)