Tags » Math Instruction

Ted’s Question: Can I Graph a Decimal Slope?

Introduction

We were working on graphing lines using the slope-intercept method.

The equation to graph was y = 4/3x + 2. Traditionally, plot the point (0, 2) first – the y-intercept and from this point, move up 4 units (positive 4 on the y-axis) while moving 3 units to the right (positive 3 on the x-axis). 412 more words

Mathematics

Is The Common Core Just Misunderstood?

Please forgive me if you hate the words Common Core. I don’t try to go out of my way to write about something controversial, but I know the potential firestorm for this topic. 912 more words

Yet Another Subtraction Algorithm!

Introduction

I recently posted Revisiting Mr. Stoddard’s 1852 Subtraction. In that posting I modified Mr. Stoddard’s idea by introducing a procedure which allows for subtraction without borrowing. 298 more words

Mathematics

Heron’s Area of a Triangle

Introduction

This is a brief story about a fun event that almost always happens when discussing the area of a triangle. The formula for the area is A = 1/2 bh, where ‘b’ is the base and ‘h’ is the height. 317 more words

Mathematics

Must We Filter Students Through the Math Sieve?

Deborah Blum in The Best American Science Writing, 2011 (page 184) cites a California Institute of Technology science historian as saying “K-12 science classes in the United States are essentially designed as a filtration system, separating those fit for what he called ‘the priesthood of science’ from the unfit rest of us.” 1,552 more words

Mathematics

A 1st Day Handout to Students

Author’s Note: The following is literally a handout given to students the first day of class. I give them time to read it and then we talk about it. 583 more words

Mathematics

A Student’s Aha Moment

Introduction

One more example of how an aggregation of student’s imaginations led the class, including the instructor, to apply Algebra to Algebra. A type of problem which frequents texts in the U.S. 371 more words

Mathematics