Christopher R. RakesChristopher R. Rakes is an associate research scientist at the Institute of Education Sciences whose research interests and publications include the teaching and learning of secondary mathematics, teacher knowledge, research design, and educational tchnology. His scholarly work involves multiple methods such as systematic review, meta-analysis, structural equation modeling (SEM), hierarchical linear modeling (HLM), and mixed methodology. He taught mathematics for ten years (eight in secondary; two in postsecondary) in both urban and rural settings, where he concentrated on helping at-risk students develop successful methods for learning mathematics. Read More Read Less