"Fordham released a paper last week by Michael Hansen projecting the impact on student learning if excellent eighth-grade teachers—those in the top 25 percent—were responsible for six or 12 more students per class. He found that moving six students per class to the most effective eighth-grade science and math teachers would have an impact equivalent to removing the bottom 5 percent of teachers.
We imagine many teachers and parents reading that finding will still fret over the idea of increasing class sizes that much, even with great teachers. So here’s some good news: schools can give a lot more than six more students access to excellent teachers, without actually raising class sizes. And they can pay great teachers—or even all teachers—more by doing so.
The key is shifting to new school models that extend the reach of excellent teachers wisely. At Public Impact, we’ve published many such models on the website www.OpportunityCulture.org, and honed them via our work with teams of teachers and administrators now implementing them in schools."