This spreadsheet is an easy way to highlight and see at a glance which addition and subtraction facts each student has mastered.
I will go through flashcards with my students, or have a parent-helper do it, and make two piles. One for mastered facts and one for facts needing more practice. When I have gone through the stack, I take the mastered facts and highlight them on the page. The next time I work with a specific child I can see which flashcards we need to work on.