the way NASA HPDE works is
HPDE group 1: drivers drive with instructors in car or lead - follow at a moterate/slow pace. passing is almost non-existant except for large straights. instructors do not cost any extra, they voulnteer in exchange for free track time. i also suggest riding with your instructor in his or her group (usually group4) to experience the track at speed. you learn why you take certain lines on corners.
HPDE group2: drivers have no instructor, but are at the same pace/rules as group1.
HPDE group3: next level up, passing is limited in the morning and is later opened up to open passing anywhere on the track by last session.
HPDE group4: many race prepped cars, open passing all day. this is also where you can apply for your competition license.
groups 1&2 run together, while 3 and 4 are seperate.
we get 4 20-30 min sessions, sometimes an open track at the end of the day, depending on how many races are going on that day. cost is normally $150 a day, laguna seca is $250
no classroom sessions, groups 1&2 just get a quick 20 min lecture on passing, learning what the line is, track ediquette, and flag meanings.
i highly suggest nasa, i put their link in a previous post. membership is $35 a year, and you get a free subscription to grassroots motorsports magazine
only requirement needed is valid drivers license, MA95 or greater helmet (i have sa2000, highest rating you can get), and a car in good running condition (no leaks, everything is sound.) get out and do it, i attend almost every nasa event. there are also private clubs ie:
http://www.unlimitedlaps.com that offer a similar environment to learn driving on the track.
