The University of California Museum of Paleontology will upgrade two STEM websites that provide free resources for teachers, students, and the public for teaching and learning about evolution and the process of science. The project will allow the museum to respond more effectively to user expectations and enhance the security, functionality, and general appeal of these educational resources. In consultation with expert advisors, the project team will review and revise the content and graphics on the 30 most-accessed, high-content pages of each site to ensure that they reflect the latest research and perspectives in the field. New features will also provide more opportunities for visitor interaction with scientific data. Both front-end and formative evaluation will guide the phases of the project.