March 28, 2015

Math Mammoth Percent book updated

Math Mammoth Percent math book cover Math Mammoth Percent is a worktext (with both instruction & exercises) that teaches students the concept of percent, how to calculate the percentage of a number, to figure discounts, sales tax, and interest, to draw circle graphs, to differentiate between a percent of change and a percent of comparison, and to know how to calculate both.

The text is suitable for grades 6 through 8 (middle school).

This book has been now updated to include many new lessons that will ALSO be in the upcoming Math Mammoth grade 7-B. This means that you can use it to continue pre-algebra studies after 7-A.

See also these free sample pages (PDF):

Contents and Introduction
What Percentage...?
Percentage of a Number
Percent of Change


Kindergarten math placement test?

Someone asked me a question about kindergarten math

Hello! Is there a placement test to see if a child is ready for 1A? We went over the kindergarten review and she did well with that, but I'd hate for her to get started and then discouraged. Is there a kindergarten curriculum that you'd recommend? My goal has been to not do anything formal for kindergarten math, but she wants it and is ready. Thanks!

That is indeed a valid concern. Sometimes children start with Math Mammoth 1-A and there's one topic there that can become a frustration point if the child is not ready for it. It's the topic of "missing items" or missing numbers in addition problems, such as

2 + ___ = 5

The idea is to ask the child to think, "2 and how many more makes 5?"

Or even simpler:

2 + ___ = 3

"2 and how many more makes 3?"

Objects can also be used.

This lesson, "Missing Items," is fairly early in 1-A. You can start with MM 1-A, and if this particular lesson presents problems for your child, then the child is not ready for 1st grade math and should continue studying kindergarten-level math for a little longer.

For a kindergarten math workbook, I'd like to recommend Evan Moore's workbook or Singapore Math's kindergarten curriculum if you want something substantial.

See also

Hope this helps!

March 21, 2015

New review of Math Mammoth

homeschool math help and advice
I just got word about a new review of Math Mammoth, from Kate's Homeschool Math Help. The owner, Kate, has written helpful reviews and buying guides for Math Mammoth, Singapore Math, and RightStart Math. She also has lots of other tips for teaching math or choosing a homeschool math curriculum on her site.

Kate says, "I'm a math educator turned homeschool mom. My mission is to help homeschool parents hone their teaching skills and teach math with confidence."

Her Math Mammoth review is here.

March 07, 2015

Calculating Pi with Real Pies

This is a neat video, showing how to calculate the value of Pi using real pies (yum!). It might help your youngsters remember the definition of Pi better as they remember the visual pic of pies around the big circle and pies going across. :)

Remember also that Pi day (3/14) is upon us soon...

February 16, 2015

An easy lesson on square roots

I've posted on my site a beginner video lesson on square roots. You can also watch it below:
Finding a square root of a number is like finding the side of a square when the area is known. Square root symbol acts as a grouping symbol: anything under it is in parentheses and is solved first. I also solve a few problems involving area & perimeter of squares.

I hope it's helpful!

February 13, 2015

Puzzle corner was too easy!

One of my customers mentioned that this particular puzzle corner from Math Mammoth Grade 1-A was too easy for her son:

Puzzling math problems

I admit, it's kind of easy. But, like I told her, I'm sure some children enjoy having an easier puzzle corner in between the others because several people have mentioned they are challenging to their children.

But, you can make it more challenging very easily: simply add a number to each equation... and possibly also make (some of) the numbers bigger. Check the examples at


February 07, 2015

Ratios & Proportions book has been updated!

Math Mammoth Ratios, Proportions & Problem Solving math book cover Math Mammoth Ratios, Proportions & Problem Solving is a worktext that concentrates, first of all, on two important concepts: ratios and proportions, and then on problem solving. It is meant for grades 6-7.

This book has been now updated to include many new lessons that will ALSO be in the upcoming Math Mammoth grade 7-B. This means that you can use it to continue pre-algebra studies after finishing 7-A.

See free samples and more info:

For now, I've kept the download price at $5.00 though the book became quite a bit longer.

January 29, 2015

Math worksheets in PDF form

Time to celebrate!

I've been working hard on the various worksheet generators at, and now all of them make worksheets both in PDF and html formats!

Below you can see examples of the variety of the worksheets:

The advantage of the PDF format is that it's portable and you'll instantly see how it prints.

The advantage of the html format is that you can edit it! Simply save the worksheet to your device and then open the file in a word processing software.

The worksheets cover topics from grade 1 through pre-algebra, such as: all the basic operations, clock, money, measuring, fractions, decimals, percents, proportions, ratios, factoring, equations, expressions, graphing, geometry, square roots, and more. And it's all free. Enjoy!

January 22, 2015

Happy Face Math

Image credit Charlie Smith

Some pointers/explanations in case you find these cryptic:

A happy face to the power of -1 is the inverse of happy face.
Happy face squared or cubed are pretty easy.
"sup" in mathematics is the supremum of a set.
Then we have a partial derivative of Happy Face.
Next, sine of Happy Face = Happy Face sign by the road.

In the second column, Re( :) ) is the real part of Happy Face, which is Happy Face without the eyes (without i's).
Im of Happy Face is the imaginary part of Happy Face = the eyes (the i's).
[Note, i is the imaginary unit used with imaginary numbers.]

Triangle followed by X is the mathematical operation curl (of a vector).
Next, the upside-down triangle is the gradient of Happy Face or "grad" of Happy Face.
Lastly, Log or logarithm of Happy Face

January 19, 2015

Homeschool Buyers Co-op group buy for Math Mammoth

Homeschool Buyers Co-op

Homeschool Buyers Co-op is running a GROUP BUY for large Math Mammoth bundles at 40% discount – just for one week!

The offer expires on January 26, 2015.

January 15, 2015

Math Mammoth January 2015 sale!

From now till January 31, get 25% off of all Math Mammoth & Make It Real Learning downloads & CDs at Kagi store!

Use the coupon code MAMMOTH at the order page at Kagi.

At you can learn about the different books I sell and see samples.
You will find links to Kagi's order pages on my site, on the various product pages.

Or, if you are ready to order, you can use these direct links to the order pages:

Remember also, I am always ready to help you find the best book/product for your situation. For many people, a good starting point is to administer the assessment test(s). I will evaluate the results for free!

Maria Miller