Curated OER
Crop Circles
Students calculate the area and circumference of a circle. In this geometry lesson, students solve word problems with circles and create formulas to calculate the area. They find the rate and complex area of a circle.
Khan Academy
Khan Academy: Gallery: Earth From Space
These satellite images of Earth shows some astonishing things about our planet and our relationship with it.
Other
Circlemakers
Now that people have come forward and admitted to making crop circles, we can enjoy them as the true art that they are! Here are some incredible examples of this art. But even the artists themselves want to believe there is something...