My wife came to America two years ago and started attending ESOL. Being from Latin America, learning English is a huge challenge for her, as many immigrants from there can testify. Her teacher recommended her to get the Regents (I bought all three levels) and it is a big help for her, so we got more for her peers. We only wish (at the time I write this review) that the books were back in print and more widely available, and also available for Kindle.