Since the first day of school, we have been counting each day in decimal form, using hundredths. We write each day/number in decimal form, fraction form, and a percentage so the students can see the connections between decimals, fractions, and percents. Because we are counting in decimals, our 100th day marked "1 Whole" for the 5th graders:
Happy 100th/"1 Whole" day of school!
P.S. Just for some silly fun, here's a video showing 100 people, ages 1 to 100 (in chronological order), playing the drums: