The primary purpose of this quantitative study was to investigate whether special education and general education teacher perceptions of collaboration, leadership, and efficacy beliefs influenced student performance on STAAR. Quantitative data were collected using a Qualtrics survey consisting of 56 items regarding special education and general education teacher perceptions of collaboration, leadership, and efficacy beliefs, as well as demographic questions (Qualtrics, 2022). State of Texas Assessments of Academic Readiness (STAAR) data from the Texas Education Agency (TEA) public website was also collected for 40 public school districts in Region 2 using STAAR Performance Reports and Group Summary Performance Level Reports (eMetric, 2023; TEA 2019, 2021, 2022). The logistic regression models utilized throughout this study did not detect a significant connection between efficacy beliefs, instructional leadership support, and collaboration on special education student achievement based on the 2023 STAAR Reading and Mathematics Assessments (eMetric, 2023). Despite prior research indicating a link between teacher collaboration, leadership, and efficacy beliefs on student performance, the findings of this study did not yield that of previous research. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]