The books contain the lessons and homework sets that are freely available on our website. They also contain unit reviews. When purchased in quantities of 20 books or more they are very competitive with photocopying costs.
All answers are available electronically as a paid membership. Because the lessons and homework sets are available for free selling access to answers is how we can continue offering new, high quality mathematical resources. Answers to the lesson portion of our curricula can also be obtained by viewing the videos on YouTube.
No. The loose leaf three-hole punch books do not come with three ring binders.