Keeping up with scientific advances is a challenging task for most science teachers, whether they teach fifth grade or introductory college biology. Educators increasingly are turning to the Internet for science news, up-to-date content overviews, innovative lessons and labs, and even individualized professional development. These searches, however, can be daunting. Despite the explosion of science-based information on the Web, it can be difficult to find a lesson, online course, or interactive game for use with students that meets a specific need. In addition, standards for peer-review, editing, and design vary greatly by provider, and not all resources are free. This symposium highlights a variety of web-based projects that are using the Internet to support high-quality science teaching. All of the featured projects use asynchronous approaches, which allow users to access resources and/or participate in professional learning activities at their own convenience, instead of at scheduled times. This type of delivery eliminates many traditional barriers (such as the need to travel or enroll in a course at a specific time) to disseminating effective teaching tools and professional education to instructors. Presenters also will share “lessons learned” about building a user-base, designing for Web 2.0, building collaborative partnerships, developing content, and evaluating the effectiveness of web-based resources.