Our equation is simple - more effective practice = quicker mastery of concept. There are three modes to the practice questions: Learn Test and Review. Learn mode has the questions and answers available to you (should you wish) as you work each question. This is a great way to familiarize yourself with the types of questions and how to solve them, as well as to reinforce concepts you learned by reading the book. Test mode as the name implies is like a mock test. No correct answers are provided until the end of the test. Review mode is great as a refresher. You get the questions and the correct answers, but no testing is done. Hints: This is a feature you will find on our math courses. If you are unsure how to solve a problem, get a hint, then another. See if you can solve the problem yourself.