This study investigated the comprehensive implementation of the Multi-Tiered System of Support (MTSS) within a school district, focusing on the engagement and collaboration of educators in refining and executing MTSS strategies. The problem investigated was the effectiveness of MTSS implementation and collaboration among educators. This action research study aimed to investigate and improve the MTSS implementation process. Participants and data collected in Cycle 1 consisted of transcripts, survey responses, and meeting artifacts. Findings from Cycle 1 revealed critical areas needing attention, which informed the action steps in Cycle 2. These steps included MTSS focus group meetings, professional development planning, material delivery to teachers, and subsequent focus group and PLC meetings. Action steps, including MTSS focus group meetings, professional development planning, and material delivery to teachers, were designed, implemented, and evaluated in Cycle 2 to address the identified areas of need. Key outcomes included the validation and refinement of MTSS criteria, effective collaboration among stakeholders, and the identification of best practices for future initiatives. Findings included the validation and refinement of MTSS criteria, effective collaboration among stakeholders, and the identification of best practices. The study concluded that sustained engagement and a collaborative approach are essential for the successful implementation and continuous improvement of MTSS practices. Implications for the district included enhanced teacher preparedness, improved student support systems, and the establishment of a robust MTSS framework. Implications for the organization included enhanced teacher preparedness, improved student support systems, and a robust MTSS framework. [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.]