This quasi-treatment study, using a non-equivalent group design, explored how a set of animations related to various concepts in algebra impacted students' ability to learn as measured by changes in quiz and test scores. The concepts that were investigated were addition and subtraction of rational expressions, solving equations involving rational…

Interesting problems sometimes have surprising sources. In this paper we take an innocent looking problem from a calculus book and rediscover the radical axis of classical geometry. For intersecting circles the radical axis is the line through the two points of intersection. For nonintersecting, nonconcentric circles, the radical axis still…

Describes results of a project to develop a distance education associate in science (AS) engineering degree program through Northern Virginia Community College. Highlights include combining self-paced independent learning with interactive/collaborative learning asynchronously; transmitting graphics, equations, and formulas via computer-mediated…