This manual/CD package shows physics instructors—both web novices and Java savvy programmers alike—how to author their own interactive curricular material using Physlets. Java physlets are applets written for physics pedagogy that can be embedded directly into html documents and that can interact with the user. This guide demonstrates the use of Physlets in conjunction with JavaScript to deliver a wide variety of web-based interactive physics activities, and provides examples of Physlets created for classroom demonstrations, traditional and Just-in-Time Teaching homework problems, pre- and post-laboratory exercises, and Interactive Engagement activities. More than just a technical how-to book, the manual gives instructors some ideas about the new possibilities that Physlets offer, and is designed to make the transition to using Physlets quick and easy.