One of the hardest things about teaching place value is that children need to understand the concept of "ten and some more"... the same concept we try to teach through ten frames, bundling, and counting on. We focus on teen numbers from the time the children enter kindergarten, and many children still do not master this concept. I have a few students who just cannot grasp this weighty concept yet, so I did what any good teacher would do. I turned to Pinterest! Check out this awesome, hands-on practice activity to teach place value:
Source: room-mom101.blogspot.com via Janet on Pinterest