The article examines the process of the repression of ishan-mullahs in Southern Kazakhstan during the period from 1920 to 1950, carried out by the Soviet government. The atheistic ideology of the Soviet regime was aimed at weakening Islam and dismantling traditional religious institutions. As a result, ishan-mullahs were accused of being "remnants of the old society," their religious activities were restricted, and they were subjected to persecution, imprisonment, exile, or execution. This policy brought significant changes to the spiritual and cultural life of Kazakh society and contributed to the weakening of the religious consciousness of the people. The article also explores methods for teaching this historical period in history classes. For a deeper and more accurate explanation of the topic, various methodological approaches are suggested for educators, such as the use of archival documents, the study of the biographies of repressed religious figures, the application of oral history methods, and conducting informative lessons through interviews and documentary films. The article also discusses modern and interactive methods of teaching historical events, such as role-playing, debates, chronological analysis, comparative studies, and project work, which help increase students' interest. The research utilizes new materials based on historical data and provides methodological recommendations for teachers. Through these materials, students will be able to understand the essence of the complex historical period of the first half of the 20th century and assess the consequences of political repression. The article aims to contribute to the restoration of historical justice concerning the religious figures of Southern Kazakhstan.