100s Day Hooray! This is a great way to group your students for 100s day activities. I usually print the crown patterns off on different colored construction paper (for grouping purposes). Then I staple each crown to a sentence strip. The day before 100s day I have the students decorate the crown with 100 small items (rice, noodles, beans, etc.). It is a great way to get the students excited about the 100th day and a great math lesson!