COMMON CORE ALIGNED :
This would be supplement to 13-3 in EnVision.
I created this packet for my third grade students.
This assumes your students can find the perimeter, understand basic shapes, and can find an unknown side.
4 word problems for each page.
It includes :
1 Guided Page - for teacher table
1 Problem Solving page - to do with partners
1 Independent page
1 Extra Practice page - for early finishers