The ever increasing availability of mathematics education software and internet-based multimedia learning activities presents teachers with the difficult task of deciding which programs are best suited for their students' learning needs. The challenge is for teachers to select pedagogical products that not only promote significant mathematical learning but also offer user-friendly functions, and are useful in the classroom. With the aim of assisting teachers in the selection process, this article reports on a framework that may be useful for evaluating software and multimedia products. As an example, an evaluation of data-analysis software, "TinkerPlots Dynamic Data Exploration" is presented. (Contains 1 table and 11 figures.)