Illiteracy is the cause of poverty. We know a cup of coffee (Starbucks) = 20 notebooks, or a school bag, or two pairs of slippers for poor children in Vietnam.
Everything can be possible if we talk about Bitcoin characteristics, I knew I person who always donates in an orphanage that come from here earnings in Bitcoin. But teaching them would be a difficult for you. Much better if you just help them by giving some necessity in their daily lives.