Learn to count dogs, mice, and cookies in random patterns.

An introduction to the Fundamental Counting Principle, a method of figuring out the total number of ways different events can occur. [5:55]

The video counts different objects and compares the total to find which object there is the most of.

Practice counting to 100 by 1's and 10's by singing along with this catchy song. [4:05]

Sal categorizes objects then count the number of things in each category. Includes a video, transcript, and question and answer section. [0:43]

Sal counts by 5s in this Khan Academy video. [2:04]

Learn about using a number line with the Odd Squad. Agents Olive and Otto help Oscar figure out which Oscarbots are missing by using a number line.

Oscar shows us how to use greater than (>) and less than (<) symbols as we explore what goes on in the North Control Room.

Learn about counting down time in this fun clip from the Odd Squad. Oscar explains what to do when you're puffed on by a puffer plant. At intervals during that one minute, very odd things occur!

Learn about counting in bundles of tens in this fun clip from the Odd Squad. Miss O coaxes her old partner out of retirement to solve an old case.

Oscar groups numbers together and counts by tens, fives, and twos when he gives the odd forecast: it's going to be raining cat and dogs.

Learn about addition with the Odd Squad. Most of the missing Oscarbots have been found in places that have their corresponding numbers. Oscar, Olive and Otto are still looking for Oscarbots 4 and 8. When Oscar mentions that 4 and 8 love...

Learn about counting down in this fun clip from the Odd Squad. Olive completes the last of her New Year's resolutions as time winds down and the countdown to the New Year begins!

In this video from Odd Squad, Olive and Otto get trapped in a comic book! Their only hope is to travel to the last page and find a mysterious scientist. But how will they get from page one to page 30?

Math is as easy as 1,2,3 with a little help from your favorite PBS KIDS friends. The media in this collection is centered around counting, operations, geometry and more! Dive into each sub-collection and discover new ways to explore math...

This collection includes 6 videos and 3 media gallery on the topic of measurement and spatial sense.

This collection includes 27 videos, 2 interactives, and 2 media gallery about counting and numbers. Peg and Cat are always learning a thing or two (or three or four or more!) from their chicken friends. On the farm in The Chicken...

This site shares a book trailer about the "Everything I Need to Know Before I'm Five" children's book. The story was written and illustrated by Valorie Fisher. It shares letters of the alphabet and counting basics for students who will...

This lesson will show students the error bounds of Taylor approximations. It is 3 of 4 in the series titled "Error Bounds of Taylor Series."

This lesson will show students the error bounds of Taylor approximations. It is 1 of 4 in the series titled "Error Bounds of Taylor Series."

This lesson explains how to find a number on a number line. It is 10 of 10 in the series titled "Finding a Number on the Number Line."

This lesson explains how to find a number on a number line. It is 2 of 10 in the series titled "Finding a Number on the Number Line."

This lesson explains how to find a number on a number line. It is 3 of 10 in the series titled "Finding a Number on the Number Line."

This lesson explains how to find a number on a number line. It is 6 of 10 in the series titled "Finding a Number on the Number Line."