What does it mean? Why is it true? Well, forget the 3.14159. Let your mind go fuzzy. Just look at the shapes. r is the radius of our circle. It’s a length.

By the time students start 4th grade in Jennifer Clark’s class, she hopes they have a solid grasp on their math facts. “Because we do so much multi-step problem solving, and we’re doing two ...

The most common source of math materials was the internet, or lesson sharing websites. Games, apps, and materials that teachers bought or created on their own were also popular. District-provided ...