KNOXVILLE, Tenn. — Third grade students at the Episcopal School of Knoxville built on lessons they've learned in the Innovation Lab. "The kids are learning about the six simple machines: the wedge, ...

After learning about the lever, wheel and axle, pulley, inclined plane, wedge and screw, the students designed a future Hilltop playground, one that included examples of each simple machine studied.

Did you know that airplanes and spacecraft are covered in wedges? The wedge shape helps them cut through the air as they fly. To learn more about simple machines be ...