Classified for credit

Reptile zoo with live snake, lizard, and turtle exhibits — covers herpetology, reptile physiology, and adaptations.

Public observatory affiliated with Texas State University — covers optical astronomy, telescope mechanics, and celestial observation.

Outdoor butterfly garden in the Lower Rio Grande Valley — entomology, butterfly life cycle, and native host-plant relationships in a live habitat.

Brazoria County combined arts and sciences center with planetarium and science exhibits — covers astronomy, physical science, and visual arts.

Planetarium and earth-science center with astronomy programs covering the solar system, space exploration, geology, and atmospheric science.

Working small farm offering hands-on agricultural visits — plant biology, animal husbandry, and sustainable food production.

School-district public observatory with telescopes open for community viewing — covers astronomy, optics, and celestial mechanics.

Small natural-history museum featuring Permian-era fossil specimens from the surrounding Texas Red Beds — supports paleontology, geology, and prehistoric biology.

Public observatory at Cleburne State Park operated by local astronomy club — telescope optics, celestial mechanics, and observational astronomy.

Working private fish farm in East Texas — covers aquaculture practices, fish biology, and freshwater pond ecology in an operational setting.

University of Texas at Arlington campus observatory — covers optics, telescope mechanics, stellar astronomy, and observational data collection.

University planetarium at UT Arlington with full-dome shows — covers astronomy, the solar system, and observational science curriculum.

University-operated planetarium with dome shows — astronomy, celestial mechanics, and the scale of the solar system.

Federally operated fish hatchery in Uvalde, TX — covers applied aquatic biology, fish life cycles, and freshwater ecology.

County aviation museum with historic aircraft — covers aeronautical engineering history, flight mechanics, and regional aviation heritage.

Recreational mining attraction where visitors sluice for gemstones and minerals — introduces mineralogy, geology, and ore identification through hands-on activity.

Permanent energy hall at the Houston Museum of Natural Science covering fossil fuels, energy systems, and geoscience.

Historic 19th-century grist mill on the San Marcos River — demonstrates water-powered milling mechanics and the role of mills in Texas frontier settlement.

Restaurant with large aquarium tanks displaying marine species — limited formal curriculum content; basic fish biology and marine habitat observation only.

Museum dedicated to telephone technology history — covers the evolution of telecommunications, electrical engineering, and the social impact of the telephone.

Wildlife museum along Shawnee Trail featuring mounted specimens and habitat dioramas — North American zoology and wildlife biology.

Visitor center near Buchanan Dam on the Highland Lakes chain — covers dam engineering, reservoir hydrology, and regional water resource management.

Historic hatchery ponds on the Texas State University campus — covers freshwater aquatic ecology, fish life cycles, and the history of public aquaculture.

University of Texas research collections housing vertebrate and invertebrate specimens — supports taxonomy, systematics, and natural-history science at an advanced level.