They break it down into sessions, usually 20 minutes each. Novice, Intermediate & advanced. Sometimes they run two groups, fast & not so fast. < these you get twice the amount of track time(miles) from the day.
For novice, they show you around the track for a couple sessions(you follow CR's). Then they let you go out on your own, just no passing in corners. I & A pretty munch anything goes, just no stuffing & 6' between passes in I.
"I" is probably the most dangerous group to ride in, such a wide range of abilities. People just coming outta N, and people ready for A.
Anyway, is lots of fun! If you like riding fast & pushing your own limits. You should hit a TD up
For the cost. Pay for a day, or the weekend(two days)