We just finished working on 2 digit addition with regrouping. Now we are moving on to 2-digit subtraction with regrouping and it is not going well. Both second grades are having a really hard time understanding it. My teammate and I have agreed (our P is fully on board as well) that we will be working on this concept and really driving it home until we leave for break. My question is do you have any unique ways of teaching this that might help the light bulbs come on? Fun math centers to practice the skills, or any other advice? I have already shown them two different ways to do it and will do anything it takes to help them make the connection. Thanks in advance for your help!