The dad's class I was mentioning was given by our hospital. It was a first-time dads class, and he learned a lot.
Breastfeeding for sure, also my husband went to the dad's class. Lamaze.
We did three: childbirth, breastfeeding and infant care. I think all three were really helpful and I would do them again if I had to repeat time over. I already knew most of the infant care stuff, but my husband has never held a baby and he really wanted to make sure he learned all that kind of stuff.