Visible learning: A synthesis of over 800 meta-analyses relating to achievement. [No authors listed] GSID: URs5gcOjDkkJ
Evidence for review of mathematics teaching: improving mathematics in key stages two and three: evidence review. [No authors listed] GSID: umxw_d-7HLgJ
A synthesis of empirical research on teaching mathematics to low-achieving students. Gersten R, Lee DS. S Baker, R Gersten, DS Lee - The Elementary School …, 2002 - journals.uchicago.edu GSID: W0ANM8WiYBsJ