Science: It's Elementary. Year Four Evaluation Report
Banilower, E. R., Fulp, S. L., Warren, C. L., & Horizon Research, I. c. (2010). Science: It's Elementary. Year Four Evaluation Report. Horizon Research, Inc, Retrieved from EBSCOhost.
(Science: It's Elementary (SIE) program--a collaboration between ASSET Inc. http://www.assetinc.org/about/AllaboutASSET.html, a non-profit, and the Pennsylvania Department of Education)