This dissertation conducted a science classroom intervention using two instructional approaches, computational modeling and paper-based pictorial modeling, in the context of food webs. A series of research papers were written on the impact of the intervention on students' attitudes and learning, and on teachers via professional development and…

The lack of diversity in the technology workforce in the United States has proven to be a stubborn problem, resisting even the most well-funded reform efforts. With the absence of computer science education in the mainstream K-12 curriculum, only a narrow band of students in public schools go on to careers in technology. The problem persists…

Podcasting holds great potential both as a teaching and learning tool. As a result, the podcasting phenomenon has attracted the attention of educators at all levels. Much has been written about the use of podcasting as a learning activity and lecture recording, but there is little research on the social and cognitive impacts of educational…