Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It's so easy!!

This program is brilliant! I couldn't have done well in my Advanced Chem class without it. Not only does ChemTutor teach you how to do each type of problem, it explains the individual answer for any question you don't understand. Plus, there's no need for a periodic table; ChemTutor already has one! ChemTutor also has quick references to helpful equations. ChemTutor also provides immediate feedback that tells you if you got the question right so that you can make sure you understand each concept before you move on to the next. Overall, ChemTutor Excalibur is an amazing program that really helps you through any problems you may be having with Chemistry.