A fun story about two characters named Peri (pronounced like Perry) and Er (which of course is short for Earl). I created this story to help my students differentiate between perimeter and area. The students enjoyed the story and it seemed to help them tell the two apart. The story doesn't mention area but I usually only have to remind them a couple times about how Peri met Er and once they've got that down they know that the other one is area. The story is followed by slides for the students to start practicing finding perimeter.