Ask HN: Where can I find good side projects for coding school students?

I am a teacher/mentor at a coding school, and our students have been asking me where could I find good side/learning projects for them. Since these will be side projects they wont be able to invest more than 15-20 hours/week into them, but they might form teams if it really looks good. We, mentors will be able to help/guide them but just a little, e.g. help with negotiations or do code reviews.

Some ideas that came to my mind: - Make a company account on a freelancing site (like Upwork) and let them pick up work from there. The profit is theirs of course. - Find charities that need help with software development (any idea where?) and help them. Its unlikely that they will get money for these, but it would look good on their (currently empty) CV. - Anything else? Im open to anything.

They are learning to program in Python (using Peewee, Flask) and know a bit of SQL and HTML/JS/CSS. So the work should be with these languages, I doubt they could pick up a new language easily at this stage. These projects should be about getting real-life experience and adding something to their CV that looks nice. But some monetary compensation would be a big plus.

So anyone got any ideas where I should look?