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In this Sept. 3, 2025 photo, Samuel J. Redman, Ph.D., Professor of History and Director of the Public History Program at the University of Massachusetts, sits in front of content he uses from the Smithsonian on campus in Amherst, Mass. (AP Photo/Jessica Hill)

High school history teacher Katharina Matro often pulls materials from the Smithsonian Institution website as she assembles her lessons. She trusts its materials, which don't require the same level of vetting as other online resources. She uses documents and other primary sources it curates for discussions of topics like genocide and slavery.

As the White House presses for changes at the Smithsonian , she's worried she may not be able to rely on it in the same way.

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