| News, lesson plans for Science, articles, databases with more resources and the National Standards for Science. |
| High School Science Lessons | Astronomy, Biology, Chemistry, Earth Science, Technology, Physical Science. Includes Insights, Connections, Vocabulary, Resources, Main Activity and "Try This" Activities. |
| History of Science and Ethics | Extensive list of sites: History of Science, Science Museums With On-Line Exhibits, Emphasis on Historical Instruments, Alchemy, Hermeticism and Natural Philosophy, related exhibits and indexes, Philosophy of Science, Ethics in Science. | |
| National Science Foundation | Contains valuable reports on current scientific topics; useful for teachers and secondary school students. | |
| ScienceWorld | Encyclopedias of astronomy, scientific biography, chemistry, and physics with an interlinked framework of mathematical exposition and illustrative examples. |