English language learners need instructional strategies that could bridge the gap between them and native English speakers. The problem is that English language learners have limited English proficiency, and they could perform at a higher academic level when their teachers deliver effective instructional techniques. It is vital for teachers to recognize English learners' cultural and linguistic differences when it comes to instruction. The purpose of this qualitative study was to identify effective instructional strategies that impact the engagement of English language learners for academic success. The Vygotsky's sociocultural theory is the guiding conceptual framework in this study. The participants were public high school teachers with at least three years of teaching experience. At a public high school in Georgia, these ten teachers anonymously answered an open-ended, confidential, interview questionnaire using Survey Monkey. The participants responded to the questionnaire by inputting their instructional strategies for English language learners. The instructional strategies included peer tutoring, small groups, usage of native language, visuals, graphic organizers, and technology. These strategies will improve the education of English learners because learning becomes more comprehensible. Although the study was limited to ten teachers, the results of this study were significant. This study revealed the common techniques that the teachers used with English learners. Further, data from this study supported existing literature on how instructional strategies can support English language learners with their academic performance in their mainstream and ESOL classes. Based on the results from this study, a recommendation is that teachers need more training, professional development, and collaboration for English language learners in their classrooms which would result in a more strategic community for both teachers and students. [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.]