This Counting and Addition to 20 (K-1) Penguin Theme Unit is perfect to practice addition and subtraction skills. Your elementary grade students will love this Counting and Addition to 20 (K-1) Penguin Theme Unit. This penguin theme unit is a great way to practice counting and adding to 20. This 21 page unit includes; tracing numbers, cut and paste, finding patterns, ten frame activity, in and out boxes and much more! CC: Math: K.CC.B.4