Embedded Files
Bio Interactive: Use the search box to find topics related to biology.
NOVA Labs: games and animated information regarding a variety of topics (look at the left side menu).
ScienceMag.com: current and past scientific studies and information
Chem Collective: scroll down to ChemCollective Resources for topics, activities and other resources.
IngentaConnect: higher level database for science, medical and behavioral topics. Scroll down to "Show" to select only "all free" results. Results are from researchers who are self publishing as well as news content.
Semantic Scholar - High level open-source search engine for science topics.
Chem Demos from the University of Oregon: collection of chemistry-topic demonstrations
Bielefeld Academic Search Engine (BASE): more than 240 million documents from more than 8,000 content providers. You can access the full texts of about 60% of the indexed documents for free (Open Access). For general science topics.
The Physics Classroom: scroll side menu or search for topics in the upper right
Nature Conservatory: topics related to the Earth and natural sciences; videos, tutorials, resources
National Energy Education Development: list of topics on the side, free PDF resources and guide available for download
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