Have some fun finding area of irregular shapes with Halloween cookie cutters!
Materials: centimeter graph paper, Halloween cookie cutters, paper plate or plastic lid, paint
Step 1: Dip the cookie cutter in the paint.
Step 2: Press the cookie cutter firmly onto the graph paper.
Step 3: Count the square centimeters. (Partials should be counted as partial squares and added.)
Extension: Ask students to figure out other (faster?) ways to determine area. For example, maybe they'll draw a rectangle around the shape, multiply length by width to determine total area then subtract squares inside the rectangle but not inside the shape. Or maybe they'll draw a rectangle inside the shape and multiply length by width to determine the middle of the shape then add the rest. Shhh, don't tell them, though! Half the fun (and learning) can be found in thinking up new ways on their own.
Looking for more activities like this? Check out Halloween Metric Measurement Activities!