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 ...

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, ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Today we're investigating how numbers can be represented in different ways. It's important that we ...

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 ...