Numbers 20 and below can be used with these sheets! Numerical Representations include: -Tens Frames -Tens Blocks -Tally Marks -Expanded Form -Word Form -Previous Number -Subsequent Number Aligned with Common Core Standards. How can this resource make my lesson planning easier? I use the date until the 20th and then loop back to the teens for days 21-31 of each month. Who is this resource for? Pre-Kindergarten to 1st graders What is included? Two Pages, each divided into half-sheets.