EASTER and SPRING 100 Chart “Window” GameGrades K-2 2-4+ PlayersThe 1-100 chart is a highly effective tool for helping students recognize number patterns and relationships within the base-ten place value system. “Windows” guide students to find one more, one less, ten more and ten less than a given number. Younger students do not need to know how to add and subtract ten from a given number; they can use the numbers to the left and/or right of the missing number and decide what number comes