One organization helping make that happen is Teachoverseas.org. Over the last decade or so I've supported individuals who have taken part in this kind of work in places like China and Czech Republic. You can check out where else they are sending teachers.
Because going overseas for a summer or for a longer period of service is challenging, the organization pays a lot of attention to preparing the teachers and emphasizing that they are going as a team.
To hear more of what they are about, check out their video page.
Please consider supporting their work!