This is a 'quick' 2 page summary of PERIMETER for basic lesson plan for core lessons for grades 3 through 7th.
As a principal, I used to give these sheets to my teachers in a grade level meeting to ensure all teachers were on the same page - conceptually and pragmatically. Hence, when the lessons were designed, sometimes several teachers planning, I was assured that all teachers thoroughly understood the concepts - word meaning, math definitions, lesson sequencing, background knowledge, topics to cover, and formula understanding.
It helps to get everyone on the same page in planning core lessons - especially in large school elementary schools where there are a lot of teachers on each grade level.
Best to you and your students!