Ever need to find the GCF of two numbers? Here’s a trick for finding the GCF of any two numbers — very quickly. This is an original trick, so I doubt you’ll find it anywhere else online. But most important, it’s easy to use, and it works no matter how large the numbers might be. Also nice … learning this […]

# Archive by Author

# The GCF (aka GCF) … what is it?

The GCF is the greatest common factor, and it’s a key concept in math. This term is also known as the GCD, the greatest common divisor. Students often need to find this quantity either for a pair of numbers or for three or more numbers. For example, knowing the greatest common factor allows students to reduce […]

# PSAT Math Test, Day of Reckoning … ?

It has finally happened … students have taken the new PSAT. I know because Singing Turtle Tutoring (the tutoring company that my wife and I run) prepares students for this test, and over the last two weeks I’ve been helping many get ready for the new PSAT’s math section. My big word of advice for many students: learn […]

# ASG 2nd Edition is HERE!

The 2nd Edition of the Algebra Survival Guide is finally here! Check out the cover: And here’s a video that tells all about the Second Edition: And just below is the PDF with sample pages from the 2nd Edition. Quick Guide to the PDF: pp. 1 – 6 ….. Intro & Front Matter, including an Intro […]

# Santa Fe Workshop Saturday

Anyone out there feeling frustrated or confused about the new Common Core math? I’m hosting a free workshop at 4:00 – 5:30 this Saturday, May 2, at the LaFarge Library in Santa Fe. The focus is how to understand the basics of Common Core math so that you can help your child understand the concepts […]

# Are Numbers Real?

For no particular reason i started thinking about math philosophically recently, and I came upon a thought that … well, I’ll just be honest … intrigues me. So, being interested in discussion, I guess I’ll just put it out there and see if this resonates with anyone. I was pondering the question: What is a […]

# Guest Blog: Fun Way to Help Emerging Readers

From time to time I will include a Guest Blog post. Today’s Guest Blog author is Kathy Rappaport, a longtime educator and reading tutor. Here’s a fun way to get young children reading with greater fluency: engage them in the art of storytelling. Children generally love to tell stories, especially while they play with […]

# MathToons #2

Just an everyday conversation between variables …

# MathToons #1

I just thought this was kind of fun.

# Reader Input on Slope Post

A longtime reader of Turtle Talk, Jeff LeMieux, of Oak Harbor, WA, sent in a suggestion based on my post yesterday about positive and negative slope. Jeff found a way to help students remember not only positive and negative slope, but also the infinite slope of vertical lines, and the 0 slope of horizontal lines […]