I don’t know if you heard Philip Johnston (Practicespot.com, Practice Revolution, etc…) just designed a new website. http://www.insidemusicteaching.com. Anyway, he has a new scale book out that looks really interesting. There are some video demo’s of it on his website. One of the things he says in the video is if the student practices a certain scale (in various ways) at least 126 times they will know that scale for life. Check it out, it looks very intriguing.