Apologies if you're aware of all this:
The "poor" often have vastly different educational needs than what mainstream schools offer. Lots of pedagogical history here, and many alternative programs (e.g., Uncommon Schools, KIPP, etc.) have been attacking this for years.
Speaking from experience, your goals aren't always as easy as it's implied from your post (not suggesting you don't know the realistic hurdles, but I can't tell from your post). As a data point for your efforts, I suggest you research an organization called Year Up which began in Boston in 2000 by Gerald Chertavian. He borrowed organizational/program concepts heavily from another non-profit that I don't recall the name of, but Google will turn it up.
Good luck, and PM me if you would like more background on Year Up and how it has grown from Boston to ten-plus other cities. Great that you're motivated to help!