## Tag: Math

Students & Educators
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Math Teachers: Can We Ignore PEMDAS?

Are you teaching that PEMDAS is flexible? Are your students equipped to handle that flexibility? You remember PEMDAS, right? It’s the acronym we use to help kids understand, or better yet remember, the order of operations. We’ve even added the catchy phrase Please Excuse My Dear Aunt Sally to assist

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Visualize a torus in SAS

This article uses graphical techniques to visualize one of my favorite geometric objects: the surface of a three-dimensional torus. Along the way, this article demonstrates techniques that are useful for visualizing more mundane 3-D point clouds that arise in statistical data analysis. Define points on a torus A torus is

Students & Educators
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Need Data Sets? Look No Further!

Data--that small four-letter word packs a mighty punch! Data is everywhere. Stores use it to determine how to advertise products, politicians use it to support their campaigns, and Google uses it to improve the search engine that may have brought you to this blog! Data is displayed in newspapers, brochures, billboards, as

Students & Educators
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Back to School: Math

Kicking off the new school year, you may be looking for ways to ease your students back into math. Here are a few ways that Curriculum Pathways can help. Math Stretch Need a fun, quick way for your students to develop their elementary math skills? Math Stretch provides activities targeting number

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Cantor sets, the devil's staircase, and probability

Last week I blogged about how to draw the Cantor function in SAS. The Cantor function is used in mathematics as a pathological example of a function that is constant almost everywhere yet somehow manages to "climb upwards," thus earning the nickname "the devil's staircase." The Cantor function has three

Students & Educators
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Geometry: Explore, Learn, Prove

Are you teaching a lesson on parallel lines? What about a lesson on the interior and exterior angles of polygons? If so, our Geometry lessons are the perfect resources for you!  We released our first one, Parallel Lines and Angles, this past fall. Since then, we've released four more. The lessons

Students & Educators
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From (A)rea to (Z)ero: 18 Quick Math Tutorials

Starting a new lesson and need a quick overview of the upcoming concepts? Or are you starting a new lesson and want students to quickly review prerequisite skills? Well, these 4-6 minute tutorials are just what you need. Why are some numbers rational and some irrational? That’s an important question

Learn SAS
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What is a moving average?

A moving average (also called a rolling average) is a statistical technique that is used to smooth a time series. Moving averages are used in finance, economics, and quality control. You can overlay a moving average curve on a time series to visualize how each value compares to a rolling

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Compute the centroid of a polygon in SAS

Recently I blogged about how to compute a weighted mean and showed that you can use a weighted mean to compute the center of mass for a system of N point masses in the plane. That led me to think about a related problem: computing the center of mass (called

Students & Educators
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SAS Curriculum Pathways Best of 2015

As 2015 comes to a close, let's look back on the great year at SAS Curriculum Pathways. Again, we saw record-breaking new users, soaring student usage, and tons of app downloads. While we love all of our 1,500+ resources, here are the ones that teachers and students used the most in

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Lo, how a polar rose e'er blooming

Lo how a rose e'er blooming From tender stem hath sprung As I write this blog post, a radio station is playing Chrismas music. One of my favorite Christmas songs is the old German hymn that many of us know as "Lo, How a Rose E're Blooming." I was humming

Students & Educators
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Five Ways Parents Can Help Students in Math Class

Throughout my 13 years of teaching, I heard this common theme time and time again from parents: How can I help? The troubles they professed were varied and numerous (e.g., concern, frustration, bewilderment). They often included the following: I don’t remember algebra. I don’t like math. The way math is taught now differs from

Students & Educators
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Our Free Algebra 1 Course: The Basics

In the summer of 2012, we launched an Algebra 1 Course. That’s right, an entire standards-aligned course! And this resource is much more than a typical math textbook. PLUS, now it’s a cross-platform resource! Yes, you read that correctly, cross-platform. That means this resource can be used on the PC, iPad, and

Students & Educators
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Mobile is at the forefront of our edtech development here at SAS Curriculum Pathways—not simply because it's the hottest emerging hardware technology entering classrooms around the world, but because of the exciting possibilities it brings to traditional learning environments. We’ve known for years that simply dropping off hardware in the classroom

Students & Educators
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Solving Equations: Is my work correct?

Solving equations and inequalities are essential skills in mathematics. And for many students, practicing is the key to success in solving. As students work on the concept of solving equations/inequalities at home, many think, "How will I know if I’m doing it right?" One answer is the Practice Solving Series,

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The sensitivity of Newton's method to an initial guess

In my article about finding an initial guess for root-finding algorithms, I stated that Newton's root-finding method "might not converge or might converge to a root that is far away from the root that you wanted to find." A reader wanted more information about that statement. I have previously shown

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The spiral of splatter

"Daddy, help! Help me! Come quick!" I heard my daughter's screams from the upstairs bathroom and bounded up the stairs two at a time. Was she hurt? Bleeding? Was the toilet overflowing? When I arrived in the doorway, she pointed at the wall and at the floor. The wall was

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Computing polar angles from coordinate data

Equations that involve trigonometric functions can have infinitely many solutions. For example, the solution to the equation tan(θ)=1 is θ = π/4 + kπ, where k is any integer. In order to obtain a unique solution to the equation, we define the "arc" functions: inverse trigonometric functions that return a

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The distribution of Pythagorean triples by angle

Last week I was chatting with some mathematicians and I mentioned the blog post that I wrote last year on the distribution of Pythagorean triples. In my previous article, I showed that there is an algorithm that uses matrix multiplication to generate every primitive Pythagorean triple by starting with the

Students & Educators
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Math Awareness Month: The Poetry of Logical Ideas

“Mathematics has beauty and romance. It’s not a boring place to be, the mathematical world. It’s an extraordinary place; it’s worth spending time there.” – Marcus du Sautoy. I agree, there IS beauty in mathematics, and I genuinely love math! Math is vital to everyday life from young kids learning

Students & Educators
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Celebrating Pi Day!

Pi is the ratio of a circle’s circumference to its diameter. Although it is a non-terminating, non-repeating number, the decimal approximation 3.14 and the fraction 22/7 are typically used to represent the irrational mathematical constant. The Greek letter π, was first used as the symbol for pi in 1706 by

Students & Educators
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SAS Math Stretch: Now with Fractions and Decimals!

The latest version of SAS Math Stretch includes several exciting new features! Designed to develop elementary math skills and number sense, this free app includes activities focused on counting, number relations and operations, and telling and manipulating time. Students can even calculate pi! The all new activities include Number Bonds and Largest

Students & Educators
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Elementary Spotlight: Mobile, Mobile Everywhere!

Mobile devices are arriving in classrooms around the world in soaring numbers. Chromebooks and iPads are everywhere – from 1:1 programs to BYOD to carts classes can share.  Why is that important? Because these devices have the power to change the classroom, provided teachers have the right integration strategies and lesson

Students & Educators
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Black History Month: Honoring Math Pioneers

In honor of Black History Month, let’s showcase a few African American mathematicians who have made their mark in the teaching profession.  Elbert Frank Cox (1895-1969) was the first black person in the world to receive a Ph.D. in mathematics. In 1917, Cox earned his undergraduate degree from the University of