EKK, we're subtracting 2-digit numbers!

Some subjects and lessons are definitely more fun to teach than others. Due to the complexity of adding two-digit numbers and borrowing from the tens place, confusion quickly arises and frustration levels sky rocket for most kids. Within the first few days of introducing and teaching the concept of subtracting two-digit numbers 50% of the kids get it and well, the other 50% tend flail for a couple of weeks, while I try and "save them". Eventually 95% of the kids understand how to find solution by the end of the month, and gradually the synapses of the other 5% come full circle by year. Borrowing a "ten" is a very abstract concept for most kids and it's not until some get a little older that this idea comes to fruition. In the meantime, small groups are the key to success!! Practice, practice, practice! It's my goal to help them all reach proficiently by the end of second grade. Fingers are crossed!