Classified for credit

Indoor aquarium featuring freshwater and marine species — covers aquatic biology, ecosystems, and animal adaptations.

Indoor tropical butterfly conservatory at Iowa State University with live emergence chamber — covers entomology, metamorphosis, and plant-pollinator relationships.

IA fossil and prairie center — paleontology dig site (Devonian fossils) and tallgrass prairie restoration.

Iowa state park with 13 developed limestone caves — covers karst geology, speleology, cave ecosystems, and physical geography through self-guided and ranger programs.

Iowa state park with 13 mapped caves — geology, speleology, and karst landform study with self-guided trails.

Natural history museum at University of Iowa covering paleontology, geology, and biological specimens across Iowa's natural history.

Smithsonian-affiliated museum on the Mississippi River covering river ecology, hydrology, towboat engineering, and the river's role in US history.

Regional natural history and science center with interactive exhibits — covers paleontology, earth science, world cultures, and natural history.

Regional science center with hands-on exhibits in physics, technology, and natural science — directly supports STEM curriculum across grade levels.

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

Restored 1848 Danish windmill with guided tours covering wind energy, gear mechanics, and Danish immigrant heritage.

School-district planetarium offering public sky shows — covers astronomy, celestial navigation, and the solar system.

Public observatory operated by Drake University with public viewing nights — covers astronomy, telescope optics, and celestial mechanics.

Center displaying fragments of the 1879 Estherville meteorite fall — covers planetary science, meteoritics, and the geologic record of extraterrestrial impacts.

Iowa DNR fish hatchery facility — applied aquaculture, fish biology, and freshwater ecosystem management.

College-affiliated public observatory with telescope access — covers observational astronomy, optics, and the physics of stellar objects.

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

Small public aquarium in Sioux City with live freshwater and marine species — aquatic biology, fish taxonomy, and basic ecosystem concepts.

Working blacksmith shop and wagon museum — covers 19th-century metalworking, mechanical engineering, and agricultural history.

Community museum with a functioning planetarium — covers astronomy, celestial mechanics, and the solar system in a domed projection theater.

Historic sawmill museum on the Mississippi — covers timber milling mechanics, 19th-century lumber industry, and applied physics of water-powered machinery.

Working steam engine museum demonstrating 19th-century mechanical engineering, thermodynamics, and the role of steam power in agricultural history.

Indoor aquarium in West Des Moines featuring freshwater and marine exhibits — covers aquatic biology, fish taxonomy, and conservation.

Community observatory with public viewing nights and educational programming — covers astronomy, telescope operation, and celestial navigation.