This pack includes 4 games that practice important 1st grade number sense concepts. Each game comes in 5 difficulty levels to be introduced throughout the year or to help with differentiating to meet students' needs. The skills include counting backwards, comparing numbers, tens and ones, identifying numbers on a number line, number order, visual representations, and identifying 10 more than a number. These worked very well in my classroom. Once I modeled each game, I could simply add a new version each month and not have to take more class time explaining a new set of directions. Please check out the preview to see the specific games.