Classified for credit

Large Maryland-National Capital Park Commission recreational park — general outdoor recreation with limited formal curriculum programming.

Johns Hopkins public observatory — telescope operation, stellar observation, and applied astrophysics on a working university campus.

Urban estuary education center on the Patapsco River — covers Chesapeake Bay ecology, water quality, and urban wildlife conservation.

Urban conservation park with stream, forest, and meadow habitats — supports field study of local ecology, watershed biology, and native species.

Outdoor nature classroom with trails, pond study, and wildlife observation — supports local ecology, life science, and environmental education for younger learners.

Specialty azalea and native plant garden managed by the National Park Service — supports botany, plant taxonomy, and horticultural science.

College-based public planetarium with sky shows — covers astronomy, the solar system, celestial mechanics, and observational math.

State-managed wildlife sanctuary on the Patuxent River — migratory bird ecology, wetland biology, and Chesapeake Bay watershed studies.

Howard County environmental area with stream, meadow, and forest habitats — watershed ecology, native plant identification, and field science.

Master Gardener demonstration plots covering plant biology, soil science, composting, and sustainable gardening practices.

18th-century Georgian plantation house with guided tours — colonial Maryland history, plantation-era architecture, and early American domestic life.

Colonial-era Maryland site with active archaeological excavation — 17th-century settlement history and field archaeology.

Urban nature center in Prince George's County with trails and natural-history programming on local ecosystems.

Museum in historic Annapolis covering Maryland colonial history, the state capital's civic heritage, and the Revolutionary and Civil War eras.

Museum at Gallaudet University documenting Deaf culture, ASL history, and the founding of American Deaf education.

Museum covering the history of electronics and radar technology — supports electrical engineering, physics, and STEM history curriculum.

Federal museum with anatomical specimens and medical history collections — covers human anatomy, pathology, military medicine, and the history of medical science.

Natural history society with specimen collections — covers taxonomy, regional ecology, geology, and Maryland biodiversity.

USNA museum with naval artifacts, ship models, and John Paul Jones exhibits — U.S. naval history, military science, and maritime technology.

Appalachian mountain state park with forested trails, a lake, and ranger programs — ecology, geology, and outdoor PE.

Maryland state park on a Potomac River peninsula with forest trails and a colonial-era church site — covers Chesapeake ecology and early Maryland settlement.

Chesapeake Bay shoreline state park at the site of the 1814 Battle of North Point — combines tidal ecology study with Maryland military history.

Historic Old Post Office tower with museum exhibits on Washington DC's architectural and postal history — covers civic architecture and government history.

Baltimore County nature center with trails, live animal exhibits, and geology features — covers forest ecology, local wildlife biology, and earth science.