Coursera Blog:

It is impossible to overstate the benefit and happiness that Coursera has brought to our son Daniel and our family.
Five years ago (next month) our severely autistic son Daniel had a major breakthrough. Then twelve years old, with a using vocabulary of thirty or forty words (though we knew he understood far more) he suddenly learned to answer questions by picking the answers out, one letter at a time, on a letterboard. Within a couple of weeks, Daniel could use the thousands of words he had heard but could not speak.
The teacher who created this breakthrough, Soma Mukhopadhyay, also taught us how to read to Daniel: read him a sentence, stop, ask him a comprehension question, get his answer on the letter board, go on to the next sentence, ask another question…