The education reporters at AERA had breakfast yesterday morning with Jane Hannaway of the Urban Institute. She presented us with some research on teaching that I'm guessing will touch a nerve with some of you... She cited data showing that teachers get more effective, as measured by their students' test scores, for their first three to four years on the job, but then experience doesn't matter after that. So, she asked, why keep giving teachers annual raises when schools aren't getting a bigger return on productivity? She also said that a teacher's level of certification does not impact student test scores. Having a masters degree doesn't help, either, unless it's in a specific subject, namely math or science.