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2. Do the Blue and Light Blue have the same material?
3. Would the Blue Series cover the same information as the Golden Series gradelevel sets?
4. Would the combo pack of Blue, Golden, and Green constitute a complete curriculum?
5. Are 3A, 3B, 4A, 4B... in the Light Blue exactly the same as 3A, 3B,... in Gold Series?
6. Can I resell math Mammoth products?
1. What is the difference between the "blue", the "golden", the "green", and the "light blue" series?
The video below explains briefly the four different series of Math Mammoth books. You can read more details below
The BLUE SERIES are topical worktexts with explanations and problems. A "worktext" means that it is a textbook and workbook combined. In other words, the 'text' and the 'work' (=problems) alternate. Each book covers a particular mathematical topic, such as addition, subtraction, clock, multiplication, fractions, measuring, or geometry.
Blue Series books do not mention nor are they tied to any particular grade level. Most of them cover material on a particular topic for 23 neighboring grade levels.
Blue Series books are great for review, reinforcement,
The LIGHT BLUE SERIES is a complete math curriculum for grades 1, 2, 3, 4, 5, and 6. It goes by grade levels. Each grade level consists of two student worktexts (A and B), answer keys, tests, cumulative reviews, and a worksheet maker. The student worktexts are similar to the Blue Series books in the fact that the worktexts contain both explanation and teaching of the concepts, plus exercises and problems.
This series suits just about everybody. It suits:
The GOLDEN SERIES are grade level collections of worksheets: onepage worksheets filled with varying problems. These books do NOT contain explanations of the concepts. Each onepage worksheet concentrates on a particular topic. The Golden Series worksheets are especially useful for teachers and tutors who need to have worksheets to give for homework or classwork. They are also useful for review. However, since the books do not contain the instruction, they do not serve well parents who cannot or do not wish to explain the mathematics themselves.
The GREEN SERIES are collections of worksheets by topic. They are similar to the Golden Series books: onepage worksheets without any explanations. Each Green Series book concentrates on one particular topic, and contains worksheets of various difficulty across several grade levels. These ar, again, perfect for teachers and tutors. The material in them is taken from the Golden Series gradelevel collections.
2. Do the Blue and Light Blue have the same material?
Practically so. There are only a few very minor differences: few pages here and there that are in one series but not in the other.
3. Would the Blue Series cover the same information as the Golden Series gradelevel sets?
Generally no, because the Blue Series books contain much more, because they contain the explanations of the concepts. The Golden Series books are worksheets (problems) only.
4. Would the combo pack of Blue, Golden and Green constitute a complete curriculum?
It would for grades 16  please see Blue Series FAQ, #1. It wouldn't for grades 78, because the Golden Series is NOT a complete curriculum. The Golden Series does not contain the explanations. The Golden Series is complete as far as the topics it has problems about, but all it contains is problems. The same is true of Green Series.
5. Are 3A, 3B, 4A, 4B... in the Light Blue exactly the same as 3A, 3B,... in Gold Series?
No. The Light Blue and Golden were written at different times and for different purposes, so they are not written to match each other. The Golden is an earlier work, written for a tutoring company. The Light Blue is a later work and written as a complete curriculum.
6. Can I resell Math Mammoth products?
You are not allowed to resell downloads. You may resell a CD, provided you do not keep copies of the files on the CD.
Maria's Math NewsThis is my newsletter that comes out about once or twice a month. Peek at the previous volumes here. You will receive: An initial email to download a GIFT of over 350 free worksheets and sample pages from my books; Maria's Math News: my newsletter filled with math teaching resources, news, downloads, humor, and giveaways. The content is equally good for all of us who teach math. 
Math Mammoth TourConfused about the different options? Take a 7day virtual email tour around Math Mammoth! You'll receive: An initial email to download your GIFT of over 350 free worksheets and sample pages from my books; 6 other emails on 6 subsequent days that describe the different series of Math Mammoth products, answering the most commonly asked questions, including "What is the difference between all these differentcolored series?"This way, you'll have time to digest the information over one week, plus an opportunity to ask me personally which book would be right for your child or students. Note: You will FIRST get an email that asks you to confirm your email address. If you cannot find this confirmation email, please check your SPAM/JUNK folder. 
"Mini" Math Teaching CourseThis is a little "virtual" email course. You will receive: An initial email to download your GIFT of over 350 free worksheets and sample pages from my books; 7 articles on important topics on mathematics education, including: multiplication tables, fractions, how to help a student who is behind, and the value of mistakes; 1 email about Math Mammoth books.Note: You will FIRST get an email that asks you to confirm your email address. If you cannot find this confirmation email, please check your SPAM/JUNK folder. 
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