Looking for an easy way to remember the unit circle or just use it to evaluate trigonometric functions. If you are in a pinch ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

Students actively engage in tasks that are doable and interesting—which frees up time for personalized instruction.

In this simulation, 66 of the 100 needles crossed a line (you can count ’em). Using this number, we get a value of pi at 3.0303—which is not 3.14—but it's not terrible for just 100 needles. With ...

Divide any circle’s circumference by its diameter and you get pi. But what, exactly, are its digits? Measuring physical ...

Celebrate Pi Day and read all about how this number pops up across math and science on our special Pi Day page. Grab something circular, like a cup, measure the distance around the circle, and divide ...