Instruct: Classify Amazon reviews into positive or negative sentiment
Query: very effective text

I took two years of high school Spanish, then went over 6 years with no Spanish lessons or use and I found this book very useful. Since this book uses a different style of teaching Spanish, it is necessary for the instructor who is teaching the class to use and follow the "Natural Approach." When coupled with a good instructor and the workbook/audio tape portion, this text was a very effective learning tool.