Looking for no prep Halloween math games? This HALLOWEEN INTEGER CANDY MYSTERY makes the perfect activity for 7th - 8th grade Halloween! Middle / high school Halloween math activities that actually teach are hard! With this adding & subtracting integers mystery, your students will be having so much fun, they won’t even notice how hard they are working! And best of al,l this resource requires NO PREP! Just PRINT and PLAY!How does this activity work? 17 clues are hidden around your roomEach c