Despite this, the case study is significant because it provides additional research on how the departmentalized instruction method may be useful in some elementary schools. The various approaches used to gather data increased the overall validity and reliability of the study. The findings were consistent with the related literature and indicated that implementing the departmentalized instruction in pilot trials could help increase achievement in elementary schools, reduce teacher stress, and improve job satisfaction, teacher self-efficacy, planning time, collaboration, and interaction with parents and students. In the future, case studies can also gather perspectives about the use of departmentalized instruction from students and
Despite this, the case study is significant because it provides additional research on how the departmentalized instruction method may be useful in some elementary schools. The various approaches used to gather data increased the overall validity and reliability of the study. The findings were consistent with the related literature and indicated that implementing the departmentalized instruction in pilot trials could help increase achievement in elementary schools, reduce teacher stress, and improve job satisfaction, teacher self-efficacy, planning time, collaboration, and interaction with parents and students. In the future, case studies can also gather perspectives about the use of departmentalized instruction from students and