Fund For Teachers http://www.fundforteachers.org/
Fullbright Teacher Exchange www.fulbrightteacherexchange.org
NEA Foundation Global Learning Fellowship - you have to be part of a Teacher’s Union in order to apply.
https://www.neafoundation.org/for-educators/global-learning-fellowship/
US-Japan exchange http://www.us-japan.org/programs/kkc/k2017/index.html
https://lrtt.org/fellowships pay for flight
https://www.goethe.de/ins/us/en/spr/eng/top.html Social studies and STEM teachers
https://www.neh.gov/divisions/education/summer-programs
https://www.gilderlehrman.org/teacher-seminars (for social studies)
https://www.jamesmadison.gov/ (also specific to history )
National Geographic Educator Certification Program - Once you complete the course, you can apply to Teacher Fellowships.
https://www.nationalgeographic.org/education/programs/educator-certification/
Association of American Educators (AAE) - you have to join the organization and you can apply for Teacher Scholarships & Classroom Grants.
https://www.aaeteachers.org/index.php/join
Fulbright Distinguished Awards in Teaching
https://www.iie.org/Programs/Fulbright-Awards-In-Teaching
Be a Tourist and a Researcher/Explorer by participating in an expedition. Some participant cost.
http://earthwatch.org/Expeditions
Facebook Group to join : Scholarships, Grants, Summer Institutes and Opportunities for Teachers