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I've worked with these folks at UW and tested their "Halobacteria" Labs in my classroom. If you're in a low-income school, they'll send you everything for free. Halobacteria are a great, resiliant model organism to grow in your classroom. Also Sea Monkeys (Brine Shrimp) love them and you can do a whole salty ecological community. They have lots of modules on Systems Thinking and dyanamic biological and environmental systems. Love their "cell phone" unit.

Students create energy pyramids for different ecosystems

Modeling the greenhouse effect

This interactive tool allows students and educators to build models that explain how the Earth system works and how it is affected by human activities and nonhuman phenomena.

How do we know that the climate is changing? In this video, provided by scientist Kendrick Taylor, learn how 8-foot long ice core samples extracted from deep in the ice layer of Antarctica hold key evidence of rapidly changing climactic conditions. Its about 20 minutes, but explains the process from ice core extraction, analysis and data collection that make up our current climate models. Best for 11 and 12, but also good for 9 and 10 advanced students. Needs to be modified for ESL and RSP students, due to the amount of chemistry and physics vocabulary.

a variety of simtualtions : carbon footprint, marine scientist tanks, ocean acidification..and more...worth looking at.