Cooper compiled 120 studies in 1989 and another 60 studies in 2006. This comprehensive analysis of multiple research studies found no evidence of academic benefit at the elementary level. It did, however, find a negative impact on children’s attitudes toward school.
The 1989 reference is the book _Homework_ by Cooper, and the 2006 reference is "Does Homework Improve Academic
Achievement? A Synthesis of Research, 1987–2003", Cooper et al 2006 http://upload-community.kipa.co.il/819201525856.pdf
If you are going to only have two research paper/book references, comprehensive meta-analyses are good choices. FWIW, the claims are consistent with what I've always read about homework research and there's no contradiction in https://en.wikipedia.org/wiki/Homework either.
Cooper compiled 120 studies in 1989 and another 60 studies in 2006. This comprehensive analysis of multiple research studies found no evidence of academic benefit at the elementary level. It did, however, find a negative impact on children’s attitudes toward school.
The 1989 reference is the book _Homework_ by Cooper, and the 2006 reference is "Does Homework Improve Academic Achievement? A Synthesis of Research, 1987–2003", Cooper et al 2006 http://upload-community.kipa.co.il/819201525856.pdf
If you are going to only have two research paper/book references, comprehensive meta-analyses are good choices. FWIW, the claims are consistent with what I've always read about homework research and there's no contradiction in https://en.wikipedia.org/wiki/Homework either.