Chapter 4: Professional Development: Meeting the Needs of English Learner and Multilingual Learners - Explains OLA’s professional development opportunities and resources for administrators, teachers, and school staff. It also details how to address the needs of “dual identified students” (English Learners with Individualized Educational Plans (IEP) and 504), immigrants, students At-Risk of Becoming Long-Term English Learners (ARELs) and Long-Term English learners (LTELs).