This is an entire differentiated unit that I developed when we were focused on perimeter and 2 part problem solving. There are 3 CFA's (common formative assessments), Level A- 9 problems- students are given the perimeter and 3 sides or an irregular quadrilateral. They must find the length of the 4th side. Level B- 5 problems- students are given a rectangle and the perimeter is given. 2 adjacent side lengths are given. This level was used with our lowest students to reinforce the concept of opposite sides are the same length. Level C- 10 problems- students are given the perimeter and 2 sides or an irregular quadrilateral. The are also given a clue to help find the missing side. They must find the length of the 4th side. Level D - 10 problems is the most complex. It is more rigorous than level C
We have a math intervention block where we level the kids based on their performance on the CFA. They are then put into 3 -4 leveled groups depending on how many title teachers we are allotted. Groups this year are intervention, near grade level, at grade level, and enrichment. This is a great way to differentiate based on student needs.