Adjust the colors to reduce glare and give your eyes a break. Use one of the services below to sign in to PBS: You've just tried to add this video to My List. But first, we need you to sign in to PBS ...

Use one of the services below to sign in to PBS: You've just tried to add this video to My List. But first, we need you to sign in to PBS using one of the services below. You've just tried to add this ...

Perimeter is the distance around the outside of a shape. Farmer John's Pet Farm is getting new fencing and turf for each of the animal enclosures. Have a look at the picture and work out the perimeter ...

Want to help your third-grader master the basics of 3rd grade math? Here are some of the skills your child will be learning in the classroom. Understand what it means to multiply numbers – for example ...

The perimeter of a shape is the distance around its boundary. This is a length, and is said to have \({1}\) dimension (1D).

Want to learn more? Sign up for a free five-week email mini-course full of research-backed strategies to help students make sense of math. In Sarah Cuddihy’s 1st grade class at Driscoll School here, ...