As the research base in support of dual language instruction become stronger and more widely recognized, dual language instruction program popularity has risen and the number of programs implemented across the United States has grown (Christian, 2018). Demand for qualified teachers and school administrators is high, but teacher supply has not risen commensurately (Kennedy, 2018b). Therefore, the problem lies in principals having to prepare and provide the necessary supports and professional development for bilingual teachers. The purpose of this research is to explore teachers' perceptions of the principal's instructional leadership practices using the theoretical framework of the Blase Reflective Growth Model. With the growing numbers of speakers of languages other than English in the United States, it is the duty of the public education system to provide effective and quality language programs and instruction for all students (Alanis & Rodriguez, 2008). [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.]