That sounds very generous of you.
At the risk of insulting chess.com, I would recommend https://www.chesscademy.com
Please Give Advice on How to Become a Chess Tutor?


After you teach them the rules, make sure to teach them piece values (i.e. A rook is worth 5 pawns), and then the following:
1) Before you move, always check to see if you can take any pieces for free, or for more 'points' than your opponent gets. (Like a rook for a knight.)
2) Before you move, always check to see if your opponent can take any of your pieces for free, or for more 'points' than you can get back.
3) Never move without a plan behind the move. A bad plan is much better than no plan.
Most players learn these intuitively, but these principles are sure to kickstart their abilities ^-^

you could also pick a book like "winning chess strategy" or "winning chess tactics" read them, and then teach from what you learn. my recollection was they are relatively fast reads.
Hi. I am involved in some church ministries which include working with children. We recently visited an orphanage and the children have very little available to them. I was thinking it would be nice to teach them to play chess. The only problem is that I am not a very good player. I know the rules, two openings and a few mating patterns. Does anyone know of some free online resources which I could use or are there other things which can be done to help me if I decide to take this on? Thank you for reading this and any suggestions.