These are three easy charts for teachers to use with kiddos when the are learning the basic patterns of numbers. The 100 chart is a standard for primary; however, the 120 chart is very important to use in kindergarten through 1st grade as well. The Base 10 number pattern only repeats AFTER the number 109. Hence, we have discovered over the last quarter century that there are about 10 to 20 percent of kiddos that do count well past 109 in both 2nd and 3rd grades. The 120 chart helps students to not counting 1010, 1011, 1012, etc. after reaching the number 109. The 200 chart is wonderful and useful in counting and rounding numbers to the nearest ten in the hundreds as well. It is recommended that teachers print these sheets out on 60 to 67 bond weight paper and laminate the sheets, so they last for 3 to 5 years. This is a simple and easy (visual) resource for students to use so they can picture the sequencing of numbers. It is not complicated, but all resources should NOT be complicated or they will not work well with students. Hope this helps your classroom and best of luck with your students this school year.