This video illustrates the use of manipulatives to help students integrate the concept of counting by ones with skill in grouping by tens. When students practice counting numbers greater than 10 with manipulatives, they learn to recognize the patterns in place value and they begin to think about sets of 10 objects as one unit. When students have these skills they are able to easily identify groups of tens and ones. Students develop foundational skills to master computation as they engage in opportunities to practice putting together (i.e., composing) and taking apart (i.e., decomposing) quantities.