When van Leeuwenhoek saw cells and single-celled organisms for the first time, he knew these small things were a big deal! Share his discoveries with young learners through a narrated video, model-building activity, and scale study....

Algae is a good thing, but too much is a bad thing. In this environmental science fair project, grow algae in several concentrations of fertilizer and observe its effect on algal growth.

This site offers instructions for a biology lab involving slime mold. Includes steps for the 5 day procedure and explains how students should evaluate their observations.