Check out this engaging power point on the singular and plural form of words. The slides begin with teaching an understanding of singular and plural. Then move to each "rule" or type of plural form. After the teaching slide there follows an interactive slide that gives students a chance to try out what they've learned. This is a great tool to use to aid in teaching a unit on singular and plural form. This is perfect for second and third grade, but can also be used as a quick review for fourth and fifth grades.