Students estimate and count to make equal groups using snacks and other food.

This lesson is about counting by tens from AAAmath.com. There are separate sections for learning, practice, playing a game, and exploring more about skip counting.

Spot the Dinosaur needs your help to group his friends. Can you help him?

Learn how to use combinations when solving counting problems involving groups. This tutorial offers a good definition of combination, several example problems and step-by-step solutions, and practice exercises for you to complete and check.

Students will have fun moving around the room and comparing items using sorting cards. They will become familiar with the math vocabulary more/less/same and most/least.

Practice counting which group has more objects. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.