Get them into the weekly lesson program. At registration mention that the younger has only been out twice. Mention if she did or didn't use the tow or chair lift. She's not a rank beginner, but only one step up. The older one would be intermediate. Mention where he is technique wise. In both cases mention what result you're looking for. I think open house is soon. This would be the kind of information I would want as an instructor. (I'm CSIA 2)