Which step is not important for formulating a quality lesson?

Determining the length of the practice session is indeed a critical aspect of lesson planning. It ensures that students have adequate time to engage in practical applications of the concepts being taught and allows for reinforcing learning through repetition and hands-on experience. The duration of practice affects how well students can absorb and apply the material, providing them with opportunities to develop skills and confidence in their abilities.

While other steps such as instructor research, assembling training aids, and choosing the right educational materials contribute significantly to the overall quality of a lesson, the practice session's length has a direct impact on student learning outcomes. Properly timed practice sessions can enhance engagement and effectiveness of the instructional activity, making it essential in delivering a comprehensive learning experience.