Affordable night classes for learning Pashto or Farsi?

Hello! I am a high school English teacher and I have some students who speak "only" Pashto and Farsi (and one of them Punjabi as well, I believe). As you can probably imagine, communication is a struggle. Anybody know of any low-cost night schools around or reasonably effective learning apps (haven't found anything yet in that vein) that could help me learn at least a little? Neither language is on Duolingo, unfortunately.