Focusing on one key point each lesson allows for deep and sustainable learning.
Certain images, techniques and concepts are important pre-cursors to later ideas.
Getting the sequencing of these right is an important skill in planning and teaching for mastery.
When introducing new ideas, it is important to make connections with earlier ones that have already been understood.
When something has been deeply understood and mastered, it can and should be used in the next steps of learning.
The smaller the distance from the existing knowledge and the new learning, the greater the success. Gu, L. (1994)
Small connected steps are easier to take.
The S plan is a perfect tool for collaboratively thinking about the small steps to mastery.
This article on collaborative planning gives practical ideas and shares the benefits seen in a school.