Illustrative MathematicsVaries

Counting the days in the month on the classroom calendar is another great place to practice the counting sequence; first count the number of days total and then count from the current date to the end of the month to get practice starting at numbers other than one. Students should practice backward counting on a regular basis; it supports students in learning subtraction. Students should have some facility with forward counting before practicing backward counting. It is important start from different numbers each day when counting by ones to increase student flexibility with the number sequence.