And Meercat's 'tip of the day'....... when teaching somebody to ski, by all means tell them how to do it.... but when you get them to do it - get them to follow you - pretty close - and just up the speed so that they need to put the right effort into staying up with you. Also, keep an eye on them. It shows you care - and it also means that they're under obligation to do what you said.
And then when you have a group of novice skiers all learning - line them up *across* a gentle slope and then tell them to all ski down at the same time doing identical carved turns in time with eachother. Oh what fun that is. :o)))