Category: Algebra 1

Negative Numbers The Number System

Adding and Subtracting Negative Numbers

Post author By mpershan
Post date November 30, 2012
5 Comments on Adding and Subtracting Negative Numbers

Wha? Explain in the comments.

And thanks again to Chris Robinson for the submission.

Expressions and Equations Solving Linear Equations

Solving Simple Equations

Say something smart about this in the comments.

Thank you to John Weisenfeld for the submission.

Algebra 1 Negative Numbers The Number System

Positive and Negative Integers

Post author By mpershan
Post date November 26, 2012
8 Comments on Positive and Negative Integers

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

exponents Expressions & Equations Middle School

Exponents – Positive Integer Powers

Post author By mpershan
Post date November 25, 2012
6 Comments on Exponents – Positive Integer Powers

Thoughts?

(via Chris Robinson)

Linear, Quadratic, and Exponential Models* slope

Slope of Parallel and Perpendicular Lines

Post author By mpershan
Post date November 23, 2012
2 Comments on Slope of Parallel and Perpendicular Lines

Why is this mistake attractive to the student? How could you make it unattractive?

Thanks to Tina Cardone for the submission.

Expressions High School: Functions

Evaluating Expressions

What’s interesting about these mistakes?

Distributive Property Fractions Number & Operations -- Fractions

The Distributive Property of Fractions

Post author By mpershan
Post date November 21, 2012
6 Comments on The Distributive Property of Fractions

See the title of the post.

What is the significance of this mistake? Say something smart about this piece of student work in the comments.

Absolute Value Distributive Property Reasoning with Equations and Inequalities

The Distributive Property of Absolute Value

Post author By mpershan
Post date November 16, 2012
6 Comments on The Distributive Property of Absolute Value

Say something smart about the Distributive Property in the comments.

And thank Ms Miles (twitter / blog) for the submission!

exponents Rational Expressions Seeing Structure in Expressions

Negatives

What’s going on in this (reconstructed) student work? Tell a story in the comments.

And then go thank Christopher Danielson for sharing this stuff.

Algebra 1 Multiplying Polynomials Seeing Structure in Expressions

Multiplying Monomials and Binomials

Post author By mpershan
Post date November 14, 2012
3 Comments on Multiplying Monomials and Binomials

Why would $2m \times m^{2} = 3m^{2}$ ? Or $2m^{2}$ ?

This mistake was brought to you by the letters M, A, R, Y, B, O, U, R, A, S, S, and A. You can follow her on twitter and on her blog.