If you are looking for something useful to do with your old overhead transparencies, you've found it! Students will be able to SEE the overlapping of the two factors and therefore gain a better understanding of the concept. Plus, it’s just FUN! All you need is overhead transparencies that can be printed on a printer and you're ready to go.
As an added bonus I have included a few pages where they will shade whole number and decimals on the hundredths grid as well as identify the equation being represented.