I’m a big supporter of any organization that offers kids, inmates or the homeless access to books or helps them use writing to understand and express what they are feeling. Here in Portland, I've supported Write Around Portland and SMART (Start Making a Reader Today). But these have been the easy contributions, consisting mostly of writing a check.
Author Jo Knowles spent a lot of time volunteering at a prison, teaching women to write. She wrote a beautiful essay about how writing prompts helped these women begin important journeys..