Classified for credit

Visitor and education center for Gray's Reef National Marine Sanctuary — covers marine biology, ocean ecosystems, and federally protected reef conservation.

Visitor center at a historic Connecticut River dam site — covers hydropower, river ecology, fish passage, and regional industrial history.

Nature center with working jam kitchen and wild-plant gardens — covers local ecology, botany, and food-preservation chemistry.

Coral farming and aquaculture operation in Vermont — covers marine biology, coral reef ecosystems, and controlled aquatic environment management.

Small local aquarium in Wilmington covering freshwater and marine life — supports ichthyology, aquatic ecosystems, and water science.

Licensed wildlife rehabilitation center — applied zoology, animal injury and recovery biology, and Colorado native species identification.

Community planetarium with scheduled public shows — covers celestial mechanics, stellar classification, and observational astronomy.

Campus planetarium offering sky programs — covers astronomy, celestial mechanics, and the scale of the universe.

Community observatory at high elevation with public viewing programs — covers astronomy, optics, and telescope operation under dark Colorado skies.

Preserved 18th-century grist mill on Fenton River — covers water-powered milling mechanics, grain processing, and early American industrial history.

Federally operated Mississippi River fish hatchery with raceway tours — covers aquaculture, freshwater fish biology, and river ecosystem management.

Museum dedicated to Connecticut River shad migration and commercial fishing heritage — covers fish biology, river ecology, and regional history.

Public observatory in Oregon City with public viewing nights — telescope mechanics, observational astronomy, and celestial mapping.

NKU campus digital planetarium with public shows — astronomy, celestial navigation, and space science curriculum.

Working museum preserving wood type manufacturing and letterpress printing — covers industrial history, typography mechanics, and print production.

Planetarium at Henry Ford College campus — covers astronomy, celestial mechanics, and the physics of light for structured sky-science instruction.

Wildlife rescue facility in Signal Mountain — covers animal rehabilitation, native species biology, and conservation science.

Waterfront marine-science program in Gig Harbor — covers Puget Sound ecology, invertebrate biology, and habitat conservation.

Public observatory with research-grade telescopes — covers observational astronomy, optics, and celestial mechanics through guided viewing sessions.

University-operated planetarium with full-dome sky shows — celestial mechanics, astronomy, and the physics of light for students at Western Kentucky University.

School-based public planetarium in Findlay — covers astronomy, planetary motion, and celestial navigation through projected sky programs.

Stockton University public observatory — introductory astronomy, telescope optics, and observational sky science.

Aviation museum focused on autogyro and rotorcraft pioneer Harold Pitcairn — covers aeronautical engineering history and principles of rotary-wing flight.

Community observatory offering public nights with telescope viewing — covers observational astronomy, celestial mechanics, and light physics.