This article examines the organization of endorsement curricula to increase preservice teachers’ confidence in their ability to teach English Language Learners (ELLs). Specifically, the authors were interested to determine what methods of instruction were most effective in increasing preservice teachers’ sense of self-efficacy in teaching ELLs. This study showed that allowing preservice teachers to engage and collaborate actively in the endorsement content with others is a very effective method of instruction in order to improve their confidence in teaching ELLs. The preservice teachers in this study believed that they could teach ELL students and that the information that they learned and the instructional methods advocated in the content were integrative and helpful for all student learning and development.