Berta's Tower: Understanding Physics Through Virtual Engineering. - Gina Navoa Svarovsky; David Williamson Shaffer (ICLS, 2004)

Berta's Tower: Developing Conceptual Physics Understanding One Exploratoid at a Time. - Gina Navoa Svarovsky; David Williamson Shaffer (ICLS, 2006)

Engineering Girls Gone Wild: Developing an Engineering Identity in Digital Zoo. - Gina Navoa Svarovsky; David Williamson Shaffer (ICLS, 2006)