passing along a review from The Homeschool Mom:http://www.exploringnature.org/
Exploring Nature is an award-winning website with natural science content and materials for educators, students, and parents.
It was originally a free resource and still contains a substantial amount of free material with upgraded resources available for paid members (subscriptions are quite affordable at $25/yr for home subscriptions).
Included in the free resources are over a dozen science databases and a monthly newsletter with new science activities, concepts, species and a monthly poster.
Not only is it an excellent natural sciences website, each resource page gives a suggested citation for the source if it is used in a report.
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