Categories
Expressions & Equations Solving Linear Equations

Solving Equations Whoopsies

Comment on anything that you like, but here are some prompts:

  • Do you like my questioning? (Because I didn’t. Notice that moment when I pause and try to unask my question?)
  • Describe, as best you can, the way that this kid thinks about the Distributive Property.
  • What would you say next, if you were me?
  • Does this video have implications about the way that you’d teach this topic? (And, come on, don’t give me that “they need lots of practice stuff.” Of course they do. But what else?)
  • Do you prefer having videos over images on this site? (Because I have about a half hour more footage from my work with this kid…)

Looking forward to a great bunch of comments here. Don’t let me down?

Update:

Here’s how I responded:

Categories
Geometry Quadrilaterals

Parallelogram Problems

parallelogram

 

This is a straight up student-empathy question: what was this kid’s thought process like?

Thanks to Tina for the submission!

Editor’s Note: I categorized this as Grade 7 – Geometry in the CCSS, but I’m not really sure if that’s right. Where does this belong?

Categories
Expressions and Equations Feedback linear functions Negative Numbers The Number System

Slope and Division of Negative Numbers

stadel

What’s the fastest way to help this kid?

 

Incidentally:

Categories
Negative Numbers The Number System

1 – (-1) = …

IMAG0251

Where does this mistake come from? I mean, the kid knows that 1 – 1 = 0, right? So does the kid think that 1 – (-1) = 0 too, or does the kid misconstrue this as 1 – 1? What’s your theory?

Thanks to Chris Robinson for the work sample.

 

Categories
Expressions & Equations Solving Linear Equations

Solving Simple Equations

anne1

 

What’s the quickest way that you could help this student?

Thank you to Anne Bailey for the submission!

Categories
Fractions The Number System

Chocolate Bars and Bad Friends

IMG_2597

 

What’s the fastest way to help this 9th grade student?

Categories
Negative Numbers The Number System

Adding and Subtracting Negative Numbers

Wha? Explain in the comments.

And thanks again to Chris Robinson for the submission.

 

Categories
Algebra 1 Negative Numbers The Number System

Positive and Negative Integers

Say something smart in the comments, and then go hang out at Chris Robinson‘s place.

Categories
Ratios & Proportional Relationships Ratios and Proportions

Proportions

What’s the mistake? Why this mistake in particular?

Thanks again to Louise Wilson for the submission.

Categories
Arithmetic The Number System

Sad faces and Negative Numbers

There’s some context that’s necessary for this post. So go read Nathan Kraft’s post about arithmetic with negative numbers.

What’s the mistake? Thoughts?

This piece of student work is kindly submitted by 3-act maven Chris Robinson.