I found the links to be very useful, and many could be used with high school students. They are all based on the National Science Standards and each link has a lot of resources.
Check it out HERE.
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Expert Voices uses weblog technology to support collaborative STEM conversations among content experts, scientists, teachers, and students from key NSDL audience groups: K12 teachers, university faculty, librarians, and library builders.
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The National Science Digital Library (NSDL) was created by the National Science Foundation to provide organized access to high quality resources and tools that support innovations in teaching and learning at all levels of science, technology, engineering, and mathematics (STEM) education.