I have started my math intervention groups for 2nd, 3rd, and 4th graders and I am really enjoying them! I feel really good about my 2nd grade group. It is a lot of the same skills (counting up, counting down, one more, one less, etc.) and I have been doing some interventions that I found in a book with them. I can see them making some progress which is awesome! I feel a little bit stuck on the 3rd and 4th grade students. A lot of them are counting on their fingers STILL...I am looking for strategies to help kids develop number sense so they have other strategies! I was thinking of a number string/talk routine such as: 3+7 and then 3+8 since they're pretty good with combinations of 10 and something like 5+10=15, so 5+11=16. Thoughts?