Comment: okay, bottom line it IS expensive. BUT, my son (15) has been using VTA for the last 6 months and has missed 3 answers! That is impressive! Not because I help at all. I only monitor and correct. He does it all. I let him choose to do odds or evens of every lesson. It might take 30-45 minutes for a full lesson. He does it 4 days a week. The videos are imperative yet simple. The methodology used is the best I have seen. I wish I were taught algebra from the roots. It would have made so much more sense. It is worth EVERY PENNY.