If you are in the New York City area and want to take some screenwriting classes to work on your craft you will want to look to the Gotham Writers’ Workshop. Apparently they are offering up some free screenwriting classes.
In fact, they have 18 different free screenwriting classes to choose from. Sadly, they started on April 8th and 9th. But they do have some others coming up. If you are in the NYC area, I suggest keeping an eye on their website to get the 411 on future classes.