Tape some coloured electrical tape around/outside of the room and have your primary (or older!) students count the number of squares contained inside each shape. Have them draw the shape and record the colour of the tape, the location, and the area on this sheet. The grade 2s I did this with loved putting their sheets on a clipboard. The tiled floor, the rectangles in a crate, the squared metal mesh in your window, or the tiles on your wall are great places to start. Get creative and have fun taping!
Tip to help students remember the difference between Perimeter and Area:
peRIMeter = RIM of something OR "perimeter" is a long word so we can remember it means the outside length of a shape.
AReA (when written this way) = the INSIDE of each letter can be coloured, so we remember that area is the amount of space the inside of a shape takes up.