Math Teacher's Got Problems presents you with a fun way to develop conceptual understanding of addition and subtraction of integers. This engaging activity applies the mathematics to a real world concept, students are already familiar with, hot air balloons. Negative integers become sand bags, positive integers become helium gas and adding and subtracting integers becomes easy! This activity is print ready, includes a key and is aligned to the common core math standards for 7th grade operations with rational numbers unit. Your class will have a blast using the vertical number line to model the flight of the hot air balloon and solve the integer problem. This works great as an math center activity or as a standalone. Instructions are easy to follow, and problems become increasing harder as the activity progresses. Make teaching modeling integer addition and subtraction NOT your problem!