You can access Boundless quizzes one of two ways. The first is by clicking the quiz button on the Table of Contents screen, and the second is by clicking at the end of each section of reading.
From here you can delve into the section that you wish to study.
Once you start a quiz you will be taken to a screen similar to the one below.
From here you can select an answer, view the page in the book where this question is drawn from, skip to the next question, or rate the question overall if there happens to be a problem.
If you happen to select the wrong answer you can click "Find the answer in the book" and be taken to the exact section of the book where you can find the answer you need. Upon finding it you can reselect the correct answer and continue on.