A long time ago, a galaxy formed that contained a solar system with eight planets—or nine depending on who is counting. A collection of 22 lessons has middle schoolers examine the Outer Planets of the solar system. They calculate the...

The second unit in the series examines the complex relationships between animals and plants in the whitebark pine community of Waterton-Glacier International Peace Park. In the first of five lessons, scholars mimic Clark’s Nutcracker...