Children in foster care are a vulnerable population in the United States K-12 education system. The purpose of this exploratory qualitative multiple-case study was to understand the perceptions of high school teachers, school social workers, and child welfare case managers regarding foster care and school collaboration protocols and supports put into place for high school foster care children in Florida. Interviews with 25 research participants revealed six major themes to answer the four research questions. The major themes identified as a result of the research are as follows: lack of information sharing between schools and foster agencies can lead to students in foster care not receiving appropriate academic supports, failure to identify foster students in a timely manner leads to delays in students receiving resources, more professional development is needed, schools need to hire a dedicated person to work with their students in foster care, not understanding the perceptions of students in foster care can lead to an increase in unnecessary services, students in foster care are at risk for achievement gaps, and neglecting to attend to the needs of the whole student can lead to them not being successful in the classroom. Understanding the perceptions of teachers, school social workers, and child welfare case managers regarding collaborative protocols for students in foster care could help school districts and child welfare agencies in the development of new protocols or reexamination of current protocols that help students in foster care achieve academic stability. Opportunities for future research may include: (a) the influence of the Every Student Succeeds Act (ESSA) on foster care policies and procedures, (b) the influence of required interagency professional development on child welfare and school personnel, and (c) the influence of multi-agency collaboration on the academic achievement of students in foster care. [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.]