A volume in Research Methods in Educational Technology Series Editor Walter F. Heinecke, University of Virginia Overall we come away from this project with a renewed sense of the complexity of evaluating the implementation and impact of technology in teacher education. In the post-PT3 period the federal government turned to large-scale experimental and quasi-experimental evaluations of educational technology but these have produced little in the way of understanding what types of technology work in various content areas under various conditions. PT3 and its approach to evaluation can be viewed as the pioneering period of educational technology evaluation in teacher education. It was a time when evaluators were just beginning to develop appropriate standards that could be used as evaluation criteria. It was a time when the accumulated wisdom of the evaluation field with regards to the primacy of mixedmethods and multiple indicators of outcomes was just beginning to take hold. PT3...