I've said this before, but it has been a while so I want to say it again. If you make it available, with little encouragement, they will eventually pick it up on their own. Really, they will. I have seen this over and over with my kids and I'm a true believer in it. I just wish I had the money to make it ALL available to them. LOL
The funny part of all this is that these were just normal conversations. We weren't talking about school, we weren't doing school work, we were just driving down the road in one conversation, just chatting and the other was at the dinner table over baked potatoes. It just amazes me sometimes. I guess they are doing okay. (Notice I said THEY. They do it themselves with me just providing the books and curriculum and being available if needed but really and truly, THEY do it.) I have AWESOME kids.... well, most of the time anyway. :o)
Have a great day!