Theodore Gray's PeriodicTable.com replaces abstract element boxes with photographs of real samples, minerals, industrial objects, consumer products, unusual artifacts, and 360-degree views collected over many years.
Frogland's All About Frogs site mixed amphibian information, pet-care material, frog species pages, jokes, art, stories, games, classroom resources, and the kind of cheerful subject obsession that defined the personal web.
Molecule of the Month has added a new chemistry article every month since January 1996, preserving nearly three decades of web-native science education across HTML, PDF, VRML, Chime, Java and modern JavaScript formats.
The University of Illinois concrete module grew out of a 1993–95 materials-technology workshop and still preserves lessons, quizzes, laboratory activities, scientific principles, historical timelines, equipment grids, and classroom exercises for teaching materials science through concrete.
NASA Goddard's StarChild site has taught astronomy to children since 1996 using two reading levels, activities, glossaries, graphics, and the wonderfully direct structure of an early educational website.
UC Berkeley's Museum of Paleontology lichen pages are a compact early-web biology lesson on the fungal-algal partnerships that make lichens, with links outward to morphology, ecology, collections, and specialist resources.
NOVA's surviving Island of the Sharks companion site preserves an early-2000s style of science education built from clickable diagrams, species indexes, dispatches, and small subject pages instead of one long article.
The Australian Space Academy is a surviving independent science-education site packed with astronomy notes, courses, reference material, observation exercises, space-law resources, and old-school institutional ambition.