The work reported in this paper focused on the creation of an Internet-based resource for preservice and inservice teachers. A World Wide Web-based instructional resource was developed by a participatory team comprised of subject area and instructional design experts as well as potential users including preservice and inservice teachers. The Constructivist Educator's Page is a Web page which includes three general types of material: a database of information and resources, an area for discussion, and a collaborative project area. The design model used was based on three guiding concepts: participatory design, recursive or iterative design, and reflection. The definition focus included front-end analysis that investigated whether there is a need for the type of alternative instructional material, the creation of a participatory team that includes both experts and potential users, and establishment of a progressive problem-solution focus. The design and development processes were combined into one focus. Preparation tasks included selection of a development environment, selection of instructional media, and selection of the format and instructional strategies. The creation tasks category includes the procedures for developing the product. Based on the comments of experts and end users, the Constructivist Educator's Page appears to have several advantages over traditional instructional models. (AEF)