In this video, Carlos practices more subtraction problems with mixed number models.

In this video, Alex learns how to read, count with and write the numbers 1, 2 and 3.

In this video, Emily learns to compare groups of objects and numbers using a 10-frame.

In this video, Daniel learns the concept of addition using addition sentences.

In this video, Marta learns how to write a subtraction number sentence, and how to use the minus sign.

In this video, Jada learns to count, read and write the numbers 16 and 17 using groups of 10 and individual numbers.

In this video, Carlos learns how to count and write a large number of objects by arranging them into groups of tens and ones.

In this video, Jackson learns the properties of basic three-dimensional geometric shapes by selecting the best shapes (cube, sphere, cylinder, cone) and arranging them appropriately to build a tower.

In this video, Emily uses an addition fact to solve a subtraction problem.

In this video, Marta learns to fill a 10-frame model to solve an addition problem.

In this video, Marta uses data collected in a T-chart to make a picture graph displaying her friends' favorite vegetables.

In this video, Marta uses 10-frames to count to 120 by tens.