Classified for credit

Guided cave tour through active limestone caverns — covers speleothem formation, geology, and karst hydrology.

Badlands geological park with fossil-rich eroded formations — covers sedimentary geology, paleontology, and erosion processes.

Toledo-area science museum with hands-on exhibits covering natural history, physical science, and STEM topics for school-age learners.

Hands-on science and technology exploratory in Wisconsin Dells with interactive physics and engineering exhibits — covers forces, motion, electricity, and simple machines.

Preserved silver mining district with underground mine tours — covers ore extraction, mineralogy, and Nevada mining history.

County-run nature and science center with live animals and hands-on exhibits — covers local wildlife biology, ecology, and basic earth science.

Large-scale model train exhibit inside a discovery center — covers mechanical engineering, geography, and scale/ratio math.

Planetarium inside Mystic Seaport Museum — covers astronomy, celestial navigation, and the science of the night sky through domed projection shows.

Industrial history center at the Lowell National Historical Park — covers 19th-century textile manufacturing, labor history, and mechanical engineering.

NPS fossil monument in Las Vegas preserving Ice Age megafauna sites — covers paleontology, geology, and Pleistocene ecology.

African Hall at the California Academy of Sciences with dioramas and ecology exhibits — covers African ecosystems, zoology, and conservation biology.

TVA hydroelectric dam with visitor center on Fontana Lake — fluid dynamics, electricity generation, and TVA Depression-era civil engineering.

USAF Academy planetarium with astronomy and space-science programming — covers celestial mechanics, navigation, and astrophysics concepts.

Working U.S. Mint facility with guided tours covering coin production, metallurgy, and the mechanics of currency manufacturing.

Federal museum dedicated to undersea warfare technology — covers submarine acoustics, torpedo engineering, naval history, and oceanographic science.

University planetarium with full-dome visualization — covers astronomy, planetary science, and space physics through live and programmed shows.

Working U.S. Mint facility tour covering coin production, metallurgy, precision manufacturing, and the mathematics of currency supply.

Federal observatory that defines US official time — covers astronomy, atomic timekeeping, celestial navigation, and geodesy.

University of Alaska research museum with Arctic natural history, geology, and indigenous collections — covers permafrost science, paleontology, and subarctic ecology.

University-operated mountain observatory on Mt. Lemmon — covers telescope optics, astrophysics, and observational astronomy.

UA lab where some of the world's largest telescope mirrors are cast and polished — covers optics, materials science, and astronomical engineering.

Univ. of Michigan natural-history museum — paleontology, dinosaurs, anthropology, and a planetarium.

University of Nebraska natural history museum with one of the largest elephant fossil collections in the world — paleontology, geology, and evolutionary biology.

Natural history museum near fossil beds featuring paleontology exhibits and specimens excavated from the nearby Oglala National Grassland fossil sites.