This literature review discusses the importance of technology to support teachers' professional development. Section 1, "Technology and Professional Development," highlights technology capacity of America's schools; barriers to effective technology use and professional development (e.g., lack of teacher training and lack of hardware and software); professional development in exemplary schools and districts; and improving professional development in technology. Section 2, "Preparing Preservice Teachers to Use Technology," notes that there are very few studies on the use of technological applications in schools of education, though those that exist indicate that technology can be a powerful tool in helping preservice teachers understand and grasp educational concepts that may be difficult to explain in traditional formats. Section 3, "Technology in Support of the Teacher Development Cycle," highlights teacher competency and school improvement, new competencies for the digital age, and a new type of ongoing staff development. Section 4, "Concluding Remarks: The Teacher of Tomorrow," presents examples of actions that state policymakers can take related to preservice education, teacher licensure, staff development, and technology infrastructure. (Contains 30 references.) (SM)