The main concern in developing a lesson plan is the:

In lesson planning, the central focus should be on the learner. Understanding the learner's needs, prior knowledge, learning styles, and motivations is essential for effective instruction. When the lesson is designed with the learner in mind, it becomes more relevant and engaging, which can lead to better retention and understanding of the material.

When planning a lesson, considering the characteristics of the learners allows the instructor to tailor content and strategies that align with their abilities and interests. This approach fosters a supportive learning environment where students feel valued and understood, leading to increased participation and success.

While other aspects such as format, content, and duration are certainly important, they are secondary to the learner's needs. The format needs to facilitate engagement, content should be appropriate for the learner's level, and the duration must be effective in covering the material without overwhelming students. However, all this should ultimately serve to enhance the learner's experience and outcomes. Thus, prioritizing the learner in lesson planning is crucial for achieving educational goals.