Number Identification for Kids is an important tool for helping kids learn to identify the numbers 1 through 20. It is appropriate for preschool students, Kindergarten students, and even ESL (English as a Second Language) and ELL (English Language Learner) students. The functionality of this app aligns to the following Common Core State Standard: - K.CC.A - Know number names and the count sequence. This app does contain advertisements via Google's AdMob service, but no ads will be displayed from categories that Google labels as sensitive.