The Golden Series are books based on the grade of your student.  There are books for grades 3-8.  There are only problems here with no explanations. These are great for review and reinforcement of concepts. My oldest is currently working on integers and how to add, subtract, multiply and divide negative and positive numbers.  These worksheets have been great for review for him!  My youngest is mastering his multiplication facts and has been using these pages to do so.  I like the way that the material is presented in a slightly different way from our regular math curriculum.  This gives my sons another way of looking at the same problem and helps the "lightbulb" to come on.  These books are about $7 and $2 for the answer key (as downloads).

The Green Series is organized my topic instead of grades.  Most of the sheets are for grades 3-7. Once again there is no teaching material here, but rather just problems.  However, I have used some of the pages from this book to introduce to my youngest some basic concepts of fractions. Once again, these pages are best for review or if you are willing to teach the concepts yourself and then have them work on the problems. As a download, this book costs $6.75.

The Blue Series is set up according to topics.  It does have explanations and problems to work through. These books cover grades 1-5. The book gives websites that you can go to that will help you teach the concepts in the book. I really like the explanations in this book.  They are step-by-step, well-written, and easy to understand. For example, for one of the lessons there are instructions on how to use a protractor and create certain sized angles (right, acute, obtuse). There is  a lot of drawing (of angles and other shapes) which makes this book rather "hands-on" in nature.  These books as downloads range from $2-$5.50.

The last series, which I didn't receive, is called the Light Blue Series.  This series is a full curriculum based on grades.  They cover grades 1-5 and are mastery-oriented. They contain both explanations and problems to do. To give you an idea of price, the 3rd grade curriculum for the full year is just under $30!

I would HIGHLY recommend these books!  I thought they were well done and very affordable!  In this day and age, with the economy the way it is, I felt that Mammoth Math would be the way to go if you want to give your child a good foundation in math at an affordable price!

There are a plethora of books available through Mammoth Math!!!!! Please go to their website to find what suits your family and for prices!

These products have been provided to me for the purpose of reviewing them. I am not being paid to do this review. I am sharing my honest opinion of how these products work for my family.