[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which addition fact is related to the given addition problem. The video uses vocabulary of addends and sum. The video is...

[Free Registration/Login may be required to access all resource tools.] The video shows a model of how to group using tens and ones, subtract, and then count what is left using the grouping. The video is followed by a series of practice...

[Free Registration/Login may be required to access all resource tools.] In this interactive media source, the video shows how to write a number sentence from counting groups of pencils, followed by practice problems to assess understanding.