Classified for credit

Amateur astronomical association with public observatory and telescopes — covers observational astronomy, optics, and the night sky.

Model railroad museum with large-scale layouts — covers mechanical engineering, scale/ratio math, and 20th-century rail history.

Bayer crop science water-learning center — covers precision irrigation, water conservation in agriculture, and crop science applications in Nebraska's Platte River valley.

Louisiana museum focused on bayou aquatic life, commercial fishing, and wetland ecosystems — supports marine biology, ecology, and Gulf Coast regional geography.

BYU natural history museum with zoology, entomology, and vertebrate collections — covers taxonomy, specimen preservation, and biodiversity across major animal groups.

Hands-on bear-focused natural history exhibit covering bear biology, behavior, and conservation in North Carolina.

West Virginia state park featuring exposed sandstone rock labyrinths and cave-like passages — covers karst geology, erosion, and Appalachian natural history.

Forest heritage center in Beavers Bend State Park — forestry practices, timber industry history, and Ouachita Mountain forest ecology.

Wildlife museum within Beavers Bend State Park featuring mounted specimens and regional fauna exhibits — supports Oklahoma ecology and vertebrate biology.

Rhode Island coastal state park featuring a historic lighthouse and rocky shoreline — supports geology, coastal ecology, and Fresnel lens optics study.

Public planetarium at the Children's Museum of Virginia with dome shows — covers astronomy, space science, and Earth's position in the solar system.

Small zoo and working honey bee farm — covers apiary operations, pollinator biology, and insect life cycles.

Museum dedicated to Beechcraft aircraft history with restored planes — covers aviation engineering, aerodynamics, and 20th-century aerospace history.

Public observatory in Virginia's Blue Ridge foothills — covers telescope optics, stellar astronomy, and celestial navigation through guided nighttime observation.

Working family apiary offering hands-on tours covering honeybee biology, pollination ecology, and beekeeping practices.

Historic 1904 aquarium on Belle Isle featuring freshwater Great Lakes species — covers aquatic biology, fish taxonomy, and Great Lakes ecology.

Dark-sky astronomy site within Bellplain State Forest with public star-gazing programs — covers observational astronomy, light pollution, and the night sky.

Mineral museum in western Kentucky's fluorspar mining region — covers mineralogy, crystal structure, and regional geology.

College-operated public planetarium with sky programs — covers astronomy, celestial mechanics, and the scale of the solar system.

Coastal nature center with hands-on exhibits — covers Delaware shore ecology, marine biology, and coastal habitat conservation.

Museum tracing bicycle technology from 1816 to present — covers mechanical engineering, materials science, and transportation history.

Geoscience center in Wyoming's Big Horn Basin covering regional paleontology, stratigraphy, and fossil formation with specimens and exhibits.

Museum built around the world's largest hand-dug well (109 ft) — covers 19th-century engineering, hydrology, and Great Plains settlement history.

Museum displaying elaborately hand-carved wooden clocks by Czech immigrant brothers — covers mechanical engineering, horology, and folk craftsmanship.