Classified for credit

Federal fish hatchery with aquarium and visitor station at FDR's Little White House site — covers fish propagation, aquatic biology, and water chemistry.

Harvard Medical School collection of anatomical specimens and medical instruments — covers human anatomy, pathology, and the history of medicine.

Amateur astronomical society observatory open for public viewing nights — covers telescope optics, celestial mechanics, and observational astronomy.

Amateur astronomy club with public star parties and telescopes — covers observational astronomy, celestial mechanics, and light/optics.

Public observatory operated by Richland Astronomical Society — telescope optics, celestial mechanics, and observational astronomy.

College-affiliated public observatory — covers celestial mechanics, telescope optics, and observational astronomy.

Historic University of Wisconsin observatory with working telescopes — covers astronomy, optics, and the history of observational science.

Exhibit at the Please Touch Museum on water systems and conservation — covers hydrology, water infrastructure, and environmental science.

Historic water tower with observation deck in Seattle — covers municipal water system history, civil engineering, and panoramic geography.

Watershed science center covering water quality, salmon habitat restoration, and freshwater ecology in the Issaquah Creek basin.

Environmental education center focused on local watershed health — covers water chemistry, stormwater management, and ecology.

School-district planetarium offering public programs on astronomy, star navigation, and space science — supports astronomy, physics, and math curriculum.

University-operated planetarium with public sky shows — covers astronomy, celestial mechanics, and observational science.

University natural history collection with specimens covering geology, paleontology, and regional biology — supports taxonomy and earth science.

Operating 18th-century grist mill on the Wayside Inn property — demonstrates grain milling mechanics, water-wheel engineering, and colonial-era technology.

University planetarium with public sky shows covering astronomy, the solar system, and stellar physics — supports math and physical science curriculum.

Western Connecticut State University public observatory with telescopes for nighttime viewing — covers observational astronomy, optics, and the physics of light.

Dual-focus museum covering early aviation engineering and a working cypress sawmill — applied mechanics, forestry, and regional industrial history.

Public observatory with telescope access for night-sky viewing — covers celestial mechanics, optics, and observational astronomy.

Working glass studio and gallery in Maryland where visitors can observe hot-glass and stained-glass techniques — covers materials science and studio craft.

Campus observatory at Otterbein University offering public viewing sessions — covers optics, celestial mechanics, and observational astronomy.

Federal fish hatchery aquarium displaying native Florida freshwater species — covers fish biology, aquaculture methods, and St. Johns River ecosystem.

Community observatory on Cape Cod offering public sky-viewing nights — covers telescopic optics, celestial navigation, and observational astronomy.

College-based natural history and wildlife museum with taxidermy specimens of North American fauna — covers zoology, ecology, and Wyoming wildlife biology.