According to the website, CIS has taught approximately 600,000 students. Because it is non-profit, it has a lot of research on the relationship between chess and academic performance. (see picture 2)
CIS organizes quite a few tournaments. Also CIS tournaments are free. Students who are not in its program schools can also sign up, but the number is limited to 20 at a time.
There's a scene in the movie "Brooklyn Castle" where CIS helps Rochelle find a GM trainer for free. Among them, CIS director Shawn is my daughter's first opponent at Marshall, whom I still remember.