"Numbers 10-20" is an engaging educational video that builds on foundational counting skills to introduce children to numbers between 10 and 20. This video is ideal for those familiar with counting to 10 and keen to expand their numerical understanding. The video methodically explores the structure of numbers 14 and 17, illustrating that these numbers consist of a group of ten plus additional units, referred to as ones. This concept is pivotal for developing early math skills such as basic addition and arithmetic reasoning. Throughout, viewers are encouraged to actively participate by counting and problem-solving with the playful guidance of a narrator. Understanding such number compositions fosters a deeper comprehension of numerical representations, essential for mathematical literacy. Additionally, the video emphasizes the importance of memorizing that all numbers between 10 and 20 have one group of ten, setting a strong foundation for future mathematical learning.