Hill, Heather C., Brian Rowan, and Deborah Ball. "Effects of Teachers' Mathematical Knowledge for Teaching on Student Achievement." American Educational Research Journal 42, no. 2 (2005): 371-406.
Hill, Heather C., Brian Rowan, and Deborah Ball."Effects of Teachers' Mathematical Knowledge for Teaching on Student Achievement." American Educational Research Journal 42, no. 2 (2005): 371-406.