What additional element should a lesson plan have if it contains swing diagnostics and improvement instructions?

Including a practice assignment in a lesson plan that already features swing diagnostics and improvement instructions is essential because it encourages students to apply what they've learned during the lesson in a structured way. A practice assignment provides targeted exercises that help reinforce the concepts and techniques discussed. This reinforces learning and ensures that students have the opportunity to practice specific skills on their own, which is vital for improvement in golf.

Furthermore, practice assignments can be tailored to individual needs based on the diagnostics provided during the lesson, enabling a more personalized approach to training. This focus on practice ensures that students are not just receiving information but are actively engaged in developing their skills over time, facilitating greater retention and mastery.

Other options such as group activities, warm-up exercises, and peer reviews, while beneficial in their own right, do not directly serve the purpose of ensuring that students apply swing diagnostics for personal improvement as effectively as a dedicated practice assignment would.