Here is a website that lists a number of Stock Car Schools. Looks like the nearest one to you would be Pocono.
http://www.racingschools.com/stock_cars_nascar.shtmlBertil Roos operates at other New England tracks, but they are primarily open wheel cars.
http://www.racenow.com/home.htmLike wise Skip Barber Racing Schools
http://www.skipbarber.com/Jim Russell operates Schools also.
http://www.jimrussellusa.com/The Buck Baker school has a very good reputation as does the Petty school, but they both operate at mostly southern tracks.
What you are probably looking for is something like the
"StockCar Racing Experience" as opposed to a school. They run operations at Pocono. A little bit of classroom instruction, then into a car on the track. If I am not mistaken, this program requires you follow or "pace" another car in front of you. I've talked to several people that have done this sort of thing and they all said it was a blast.
Hope that helps