Students explain the seasons and moon phases .
For additional hands-on activities, lessons and curriculum, and resources in astronomy education, explore the following web sites of educational projects that have developed effective instructional materials. Cornelius, G., and P. Devereux. Coyle, H.P., B. Gregory, W.M. Luzader, P.M. Sadler, and I.I. Shapiro. The universe in your hands. Children's ideas in science.