Within the last ~12 years I started two algorithms summer camps, AddisCoder in Ethiopia and JamCoders in Jamaica, for high school students in these two countries (see addiscoder.com and jamcoders.org.jm). These are each 4 week programs, 40 hours per week, with teaching assistants showing up a week early to help prep.
If you would like to volunteer as a teaching assistant for either program, please apply (AddisCoder application link, JamCoders application link)! We cover plane tickets, meals, and housing for all volunteers, and I promise that both Ethiopia and Jamaica are nice places to visit. Previous volunteers from CodeForces include SoMuchDrama, Reyna, IanDeHaan, mukeremali.
If you decide to apply to be a volunteer teaching assistant, please do so by Dec 31st.