Ruby Payne has a book out called A Framework for understanding Poverty. In
it she discusses hidden rules, role of language, characteristics of
different kinds of poverty compared to those of middle class, and some ways
to meet these issue when teaching students in schools. She is a great
speaker and talks and teaches teachers all over the country. If you want
to really bite into what she is saying and see what you think......read the
book...or see if you can get to hear her sometime. She has a website too.