Research has frequently shown that student response systems increase student engagement, achievement, and success. Researchers at Vanderbilt University have compiled a bibliography of articles on student response systems in various classroom contexts; these scholarly studies show this link between student success and response system usage.
Complete Vanderbilt University Classroom Response System Bibliography
Vanderbilt University "Vendor Comparisons and Adoption Issues"
Bloom's Taxonomy For A Digital Age
StarrMatica Case Study (Pekin Elementary, Packwood, Iowa)