I did a three day race school at Lime rock with Skip Barber, best thing I have ever done. They sometimes have this standby thing, so if your flexible, you can go on standby, and if they dont have a full class, they will call you the week before. You get a pretty good discount. I am a much better driver due to this course.

 

I did the 2-day performance course earlier this year, it was a blast... I had a little experience in the past, but learned a ton in the 2 days.. They do a great job of teaching to your abilities to push you the next step, so you don't get hampered by slower/less experienced drivers, but also don't get run-over by faster/more experienced guys...

I plan on doing the advanced course next year - haven't decided between the Porsche school or the AMG school, since it is here in the bay area..