This is an open-ended investigation for student-centered learning brought to you by Math Vision. Students begin by discussing whether or not rectangles with the same area have the same perimeter. Next, they build arrays/rectangles with the same area and measure the perimeters. This hands-on investigation helps students understand the relationship between area and perimeter, and also introduces them to square and prime numbers. Students also build a stronger understanding of the connection between the area model and multiplication.