The study explored the evaluation of digital instructional materials (DIMs) by K-8 teachers of mathematics, positing that a useful perspective for evaluating DIMs by K-8 teachers of mathematics is considering how technology integrates with research-based practices for teaching mathematics. This paper describes the study that drew on the…

This study examined teachers' uses of virtual manipulatives across grades K-8 after participating in a professional development institute in which manipulatives and technology were the major resources used throughout all of the activities. Researchers analyzed 95 lesson summaries in which classroom teachers described their uses of virtual…