The National Endowment for the Humanities offers tuition-free opportunities for K-12 educators and higher education faculty to study a variety of humanities topics. Stipends of $1,200-$3,300 help cover expenses for these one- to four-week programs. To see all the programs and apply, go here. The eligibility criteria follows:

NEH Summer Seminars and Institutes for Higher Education Faculty
NEH Summer Seminars and Institutes for K-12 Educators
Landmarks of American History and Culture Workshops

Questions? Please email sem-inst@neh.gov regarding Summer Seminars and Institutes, and landmarks@neh.gov regarding Landmarks of American History and Culture Workshops.