The body of knowledge recognized and accepted by professionals in any field of study is often increasing, refined, and revised. Policies and procedures within organizations and government agencies change, sometimes with great frequency. Professional development refers generally to the process of remaining current in one’s professional area of expertise, which includes functioning as a member of a professional community. Participation in professional development, or designing and delivering professional development, often requires the use of tools or technologies. As such, it is important to understand the tools and technologies used for experiencing, or designing, professional development. This entry first discusses tools and technologies commonly used in formal and informal professional development. The entry then discusses the design and development of professional development experiences and emerging trends ...