Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Really Helps

As a non-math person who likes to keep a straight A average, I found these DVD's an invaluable resource for stats class. The teacher is superb, and the opportunity of repeating a class is very helpful to those of us who need a couple of passes before math concepts crystallize. I got an A in my stats class with the help of these DVDs but I toughed it out till mid-term before I bought them. My advice to non-math types is: know yourself--buy these right at the start of class, and you will get your full money's worth out of them.