We purchased this complete course as an elective for my 11th grade homeschool student. This is NOT a course for beginners. We have struggled thru the first 3 books, and they are not self-explanatory. We love ACE Pace learning, but this course is too challenging for even this mom who studied accounting in college and worked in accounting for 8 years. I wish I had only purchased the first booklet, but I never expected ACE Pace to not explain the "how to" for all the steps. VERY CONFUSING!