This is an interactive subtraction lesson for the Smart Board. It has a seasonally appropriate St.Patrick's day theme. This lesson may be used in a math center or in whole-group math instruction. Students will LOVE the self-revealing answers. A leprechaun appears on the board with different amounts of gold in his pot. On each screen, the students are given a word problem and are asked to solve it on the board. The gold and leprechaun will fade away when touched to provide an interactive man