Ecological Footprint Quiz – A quiz designed to estimate the amount of land and ocean area required to sustain one person’s consumption patterns and absorb that person’s wastes every year.

PowerUp – Downloadable 3-D game.

Son of Citation Machine – Free Bibliography and Citation Maker

EasyBib – Free Automatic Bibliography and Citation Maker

The OWL Writing Lab at Purdue University

The US Environmental Protection Agency Teaching Center

Energy Hog –  A game that allows students to identify and get rid of hogs that pig out on energy!