Literature has documented the benefits of problem-based learning (PBL), but also shown significant barriers to using PBL in K-12 education. Yet, the research describing why and how K-12 teachers implement PBL is insufficient. In this qualitative study, using semi-structured interviews, we investigate why 25 middle school teachers chose to…

A Web mashup is an application that combines data and functionality from more than one source. By bringing disparate data together in ways that enable users to do new things or accomplish common tasks with newfound efficiency, mashups are rapidly increasing in number and may offer exciting new possibilities for classroom instruction. However, in…

Researchers have suggested that self-efficacy and goal orientation are context specific variables. However, few researchers have addressed these variables in technology-enhanced learning environments. This study examined changes in 549 middle school students' goal orientation, self-efficacy, and science knowledge after engaging in science learning…

This study examined the effect of a hypermedia-enhanced problem-based learning environment in astronomy on sixth-graders' science knowledge, attitude toward learning science, and motivation toward learning. It was found that the students had significantly increased their science knowledge from pretest to post test and also retained much of what…