Enjoy these 3 versions of adding and subtracting rational numbers for your unit!The 3 activities are the same problems but how the kids interact will be completely different. Gallery walk and task cards are available, but I wanted to explain that the third activity aligns with the research Peter Liljedahl completed about how vertical non-permanent surfaces enhance a student's willingness to work and think. It is simply a slides presentation that will be on the board, and the students complete t