Halloween Interactive Math Game Your class will love practicing Addition and Subtraction concepts for 1st grade with this frightfully fun Interactive game! This game is made in Powerpoint and will work on your Smartboard, desktop, or Promethian boards. To play this game you can assign your children into up to 4 groups or have children solve answers independently on paper or a whiteboard. Play begins when a number is picked from the haunted house. The children will then solve the question tha