I am charting (to avoid at the moment) and learned the method through the book TCOYF. We don't use any barrier/other contraception, so I basically consider myself practicing NFP, though we never took an official NFP course. We may take one at some point, but in the meantime I was wondering....
What other main ideas are taught in the course besides charting?
I've heard that they recommend exclusive breastfeeding as it is healthy for the mother and the baby and it extends your infertile period post-partum. Is there an issue with the Church's teachings if someone chooses not to breastfeed or chooses to only breastfeed for a short period of time so they may attempt to have another child sooner than later?
Is there anything else of note that I've missed?