If you are interested in learning more about the history of supplemental instruction, its theoretical underpinnings, and its impact on student performance, you can browse the following links. This is not intended to be a comprehensive list of scholarly literature regarding SI, but rather a compilation of relevant sources to better inform you about the topic.
Arendale, D.History of Supplemental Instruction (SI): Mainstreaming of Developmental Education. Retrieved from University of Missouri-Kansas City: http://a.web.umkc.edu/arendaled/sihistory02.pdf.
Arendale, D. Supplemental Instruction (SI): Review of the Research Concerning the Effectiveness of SI from the University of Missouri-Kansas City and other Institutions from across the Unites States. Retrieved from http://www.eric.ed.gov/PDFS/ED457797.pdf.
Edwin R. Etter, Sandra L. Burmeister, Randal J. Elder, Improving student performance and retention via supplemental instruction, Journal of Accounting Education, Volume 18, Issue 4, Autumn 2001, Pages 355-368, ISSN 0748-5751, 10.1016/S0748-5751(01)00006-9 (http://www.sciencedirect.com/science/article/pii/S0748575101000069)
Ning, H. K., & Downing, K. (2010). The impact of supplemental instruction on learning competence and academic performance. Studies in Higher Education, 35(8), 921. Retrieved from http://search.proquest.com/docvew/i851365063?accountid=12617.
Supplemental Instruction/Video Supplemental Instruction Annotated Bibliography. (2010). Retrieved from University of Missouri-Kansas City: http://www.umkc.edu/cad/si/si-docs/sibib.htm.
The International Centre for Supplemental Instruction. http://www.umkc.edu/cad/si/.