Question: As a principal, you are the school's instructional leader and responsible for providing professional development in various content areas. What course of action should you take to ensure that your impact on teacher learning is optimum? Group of answer choices Use lecture as the primary format to deliver training. Deliver the training in an email or newsletter to save time. Provide the same professional development to all teachers. Apply a variety of data-driven and research-based adult learning strategies related to each content area.