The Physics Front collection is the physics and physical science online library developed for pre-college teachers within the ComPADRE Digital Library Pathways Project. The Physics Front  serves a broad spectrum of users that include new and crossover physics teachers, pre-service as well as in-service teachers of physical science and physics for grades K through 12, teacher preparation instructors in universities as well as students of physics and physical science. Participation in The Physics Front collection also extends to physics departments involved in the preparation of pre-service teachers and the support of in-service teachers and their students.