Students, Educators: use the Science Primary Literature Database …
Available at no cost; curated and updated; search for articles, books, and images that actual college and university students have found useful for papers, projects, labs, and experiments, plus links to full text and links to citing publications.
See also —
Science Sources/Bibliographies (starter bibliographies on a range of science topics)
Science Matrix (get more out of primary literature)
Questions? Please let me know (firstname.lastname@example.org).