Academic and professional success depend on the ability to communicate effectively in English, but traditional high school education frequently falls short of meeting the needs of a diverse student body. One promising approach is differentiated learning, which adjusts the process, content, and evaluation to the readiness, interests, and learning preferences of the students. This study investigates the application of differentiated learning in English classrooms using a qualitative methodology. The results show both advantages and disadvantages, including longer preparation times and limited resources. Diverse assessments, adaptable lesson planning, and sufficient teacher preparation are necessary for effective differentiation. Resolving these issues can improve English language learners' academic performance and level of engagement.