Why I can't talk on chat's or forum's on the weekdays

Well, I only really have internet on the weekends because my parents are divorced and I see my dad on the weekends (my mom won't let me have it, I don't know why.) I can post and comment on the weekdays, only because I am at school and they haven't blocked it. They have however, blocked chats, I can't even see the chat. So if you want to talk to me, use a comment.