There is a need for sound self-efficacy measures in education that are based on Social Cognitive Theory. Physical education benefits public health by addressing physical inactivity and obesity. The purpose of this study was to develop and test a standards-based training program and virtual blog on self-efficacy. Participants were 60 physical education teachers recruited from 16 school districts. Three self-efficacy scales were administered at the beginning of a workshop and after a six-week collaborative blog. The major finding is that the intervention enhanced self-efficacy to a much greater extent than the control group. The average experimental group effect size for ESBI was .97 compared to .19 for the control group. This work supports the notion that self-efficacy is specific to context and content and could serve as a guide for future professional development opportunities.