Becoming comfortable with two-digit and three-digit numbers is an important skill. Becoming comfortable with two-digit and three-digit numbers is an important skill in second grade. Your child will ...

Numbers can be shown in many ways, not just as written digits. Explore how to represent numbers using materials such as ...

When you are solving an addition calculation with a two-digit number, you need to think about tens and ones. A place value chart can help you to see the value of each digit in a number. For example, ...

The poster will showcase two ongoing projects in the Development Education and Learning lab at CU Boulder that aim to understand the cognitive processes involved in early multidigit number learning ...