Are they really necessary to attend? I've had several people tell me I needed to. I've already chosen the curriculum we are using. I really don't see the need to.
Is it really necessary or is it okay to skip those?
Nope. I went to the one local to me and it was a waste of time. Everything was christian based and we follow a secular study. Plus it was expensive. I don't like wasting my money when I can buy used books online without having to fight so hard.