This case study of a teacher of Arabic-speaking heritage language learners (HLL) reported the experiences and pedagogical practices of a teacher to better understand the reasons for her success in preparing young HLL. The teacher's experiences informed findings regarding ways to improve HL teaching for Arabic-speaking students. This research study addressed a decided gap in the knowledge of effective teaching practices for Arabic as a heritage language (AHL) in high school. Therefore, the present study helps fill this gap by conducting a case study of an AHL teacher in the context of high school teaching. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]