Will they teach me to breathe?
The classic image of an antenatal class is a group of women lying on the floor, learning to breathe in unison. The idea here is that you're supposed to use the same method as a way of coping with pain in labour.
In reality, while relaxation as a form of stress relief may be taught, rigid breathing methods are rarely seen these days. Instead, the best classes will encourage you to be fit and to know what your choices are in labour, including the different labour positions and the various methods of pain relief available, such as massage and water as well as drug options.