Acetylene torch, arc, and MIG. They also have an advanced class that focuses strictly on TIG welding.
The class was $120 total - $60 for the registration, and $60 for supplies. I thoroughly enjoyed it, and I would highly recommend it to anyone in the North Dallas area.
I've thought about doing the advanced class, but we don't do a lot of TIG here at work, and I've got access to MIG welders and supplies through my company that I can practice with.