I'm now an old man, but I grew up in the programming contest community back in my youth ~15 years ago (back when TopCoder and the UVA online judge were more popular), and I don't think I'd have ended up with my current job as a computer science professor doing algorithms research without that experience.
I want to share that experience with others, so in the last ~10 years I started algorithms summer camps AddisCoder and JamCoders to teach algorithms to high school kids in Ethiopia and Jamaica, respectively (see what topics we teach here). 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 and housing for all volunteers, and I promise that both Ethiopia and Jamaica are nice places to visit. Previous volunteers from CodeForces include SoMuchDrama and Reyna.
If you decide to apply to be a volunteer teaching assistant, please do so by Dec 31st.