Test out your knowledge of counting on to and back from 20 with this quiz, then read on to complete the page. All the numbers between 10 and 20 are made up of 1 ten and different amounts of ones.

The numbers increase by 10 moving ... on 24 and move 20 spaces to land on 44. Another way would be to move up (or down, depending on the chart) two rows (for example, counting “one ...

When she was a graduate student at Johns Hopkins University, Jinjing Jenny Wang kept wondering: How do children learn to count ... often can say the numbers from 1 to 10, they don’t truly ...