Let's take a trip to the train yard today! This isn’t an ordinary train yard with ordinary trains. Instead this is a Mighty train yard! In this video we learn how to read and write numbers up to 1,000! We learn that numbers can be shown in many ways. For example twelve, 12 and 10+2 are all ways of showing the same number! We practice using base-ten blocks, number names, and expanded form. Let’s get started!