The purpose of this study was to develop and validate a scale designed to measure physical educators' self-efficacy and sources of information to teach students with disabilities across different types of instructional placements for physical education. Scale construction consisted of four phases: (a) item development, (b) content validity, (c) exploratory factor analysis, and (d) confirmatory factor analysis. Data from 268 (172 males; 86 females; five others; five undisclosed) and 169 (105 females; 64 males; one undisclosed) participants was used for exploratory factor analyses and confirmatory factor analyses, respectively. The final instrument is comprised of 29-items: 7-item (one-factor) self-efficacy scale and 8-item (two-factor) efficacy-relevant information subscale for teaching students with disabilities in integrated placements; 7-item (one-factor) self-efficacy scale and 7-item (two-factor) efficacy-relevant information subscale for teaching students with disabilities in self-contained placements. Results support the use of the "Self-Efficacy to Teach Students with Disabilities Across Instruction Placements for Physical Education."