8, 9, 10... teen numbers, here we come! In this video, we explore numbers 11 - 20. These numbers are a big stepping stone because we start anchoring to number ten and adding more. For example, number 13 can be broken into 10 and 3 more. This method helps students understand place value and prepares them to learn larger numbers as well. In this lesson, we also learn to write all the numbers from 11 -20.