Among longtime history teacher Karalee Wong Nakatsuka's most prized possessions are two nearly identical T-shirts with very different meanings. One comes from Philadelphia's Museum of the American ...

A survey of social studies teachers found that many find primary sources online for lesson plans. But a notable minority also rely on left-leaning materials, and a handful have turned to conservative ...

The White House criticized the Smithsonian's classroom lessons. But some teachers say the materials are invaluable.