Third graders experience optic illusions by creating flipbooks. For this optics lesson, 3rd graders view a demonstration of the workings of rods and cones using a camera. They are shown an optical illusion and work to create their own...

Fourth graders examine the basics of bird watching, finding and interpreting bird clues and attracting birds to a particular location or habitat. They go on a birding hike after a lecture on what to look and listen for in the woods.

Collaboratively, students partake in a hands-on activity in which they build models of a watershed. Each group member draws an elevation map—a bird's eye view—of their model and predicts how water will flow from the high to low points....