This is a great activity to use when you are introducing teen numbers to your kiddos. Not only do they get to practice their one-to-one counting, they also have the chance to write their teen numbers! Simply print off a recording sheet for each student, and a set of teen number cards for each group. Students take a card, count the number of items on it, and then write that number next to the corresponding number on their recording sheet! For an added challenge, hide the cards around the room for the students to find, or have them order the cards!