Issues Related to Teachers. Powerful conceptual technologies are not simply new ways to address old ideas. New types of knowledge and abilities become important, and new levels and types of understanding become important for old ideas and abilities. Furthermore, just as learners are changed by technology, so too are teachers. Indeed, the profession itself is changing. Research on teacher enhancement and preparation must take into account the new technological tools and contexts for the practice of teaching. Especially important is research that deepens understanding about how teachers can exploit opportunities to promote active learning and assessment, and how technology itself can serve the process of this integration into everyday practice.