This is a really good example of an activity that could be used in a 1st grade classroom because it shows the basic understand of subtraction and meets the standard 6. Add and subtract within 20, demonstrating fluency for addition and subtraction within 10...

This can be used in my future middle school or even high school classroom. To this day, I still use a variation of this method to solve math problems, so it can be extremely useful for my students as well.

Teacher of Scholars: Anchor Chart Preview and Math Strategies. This is great! I really want my students to be successful in small groups and this will definitely help me teach them.