Teaching Native American histories, an NEH Summer Institute for Teachers, July 5-26, 2019, Martha's Vineyard and Cap Cod, application deadline is March 1, 2019 MA http://teachnativehistories.umass.edu/neh-programs/2019

Re-Enchanting Nature: Humanities Perspectives, July 1-19, 2019, Helena, MT, application deadline is March 1, 2019 https://www.carroll.edu/neh-summer-seminar

The Battle of the Bighorn and the Great Sioux War, June 16-22 and July 7-13, 2019, Billings, MT, application deadline is March 1, 2019 http://www.msubillings.edu/neh/index.htm

All National Endowment for the Humanities offerings https://www.neh.gov/divisions/education/summer-programs?field_sort_date=1&sort_by=field_sort_date&sort_order=ASC&f%5B0%5D=summer_program_audience%3A351

Westward Expansion, July 21-27, 2019, Boulder, CO, application deadline February 18, 2019 https://www.gilderlehrman.org/seminar-detail/948

The Cold War, Korea and Vietnam, June 30-July 13, 2019, San Diego, CA, application deadline is March 4, 2019 https://www.midway.org/education/teacher-programs/midway-institute-for-teachers/#Program1

As some of these require more than a form to be filled out, it is good to start early.