This calendar math sheet focuses on the number of days you have been in school. This number is shown in various forms including place value, base 10 blocks, expanded form (100 + 20 + 5), word form, on the number grid, and in money. The first page in the file is for days 1-99 of the school year and the 2nd file is for days 100+. It is shrunk to a half size so that it can fit in students' math notebooks/composition books. It can also be blown up to a poster size for your math bulletin board so that students can view it throughout the day.