This activity I created to help my students with their number sense abilities for the beginning of the year. It's a great tool to use to really have your kiddos think in terms of number order and sequencing, as well as increasing by 1, and decreasing a number by 1; as well as increasing by 5, and decreasing by 5, etc. I have included 3 different worksheets, that offer a variety of numbers up from the 10's to 90's...all 2 digit only. These worksheets you can utilize whole group, small group, or