What's holding back the digital curriculum? A lot of things: too few classroom computers, poorly conceived professional development, and a lack of time to research and plan--to name three big factors, according to a new report from the nonprofit Education Development Center (EDC).

The study, "Effective Access: Teachers' Use of Digital Resources in STEM Teaching," examines how high school teachers use digital libraries and other electronic resources to support "science, technology, engineering, and mathematics" (STEM) exploration and instruction.

Despite the recent progress touted by some policy makers--progress some are