If you work in schools, you have likely used practices from Applied Behavior Analysis (ABA), even if you did not know it. This includes a wide range of practices such as: using high frequency opportunities to respond when teaching a lesson, providing practice with specific feedback, conducting progress monitoring in a reading intervention to guide next steps, using a prompt hierarchy, and teaching communication using the Picture Exchange Communication System (PECS). Fundamentally, evidence-based instruction and behavior support have a basis in ABA.