I start with this warmup from Illustrative Mathematic’s lesson on elimination: Their materials include a nice example analysis activity as…

# Faded Practice – Substituting to Solve Systems of Linear Equations

First, an estimation warm up to make sure everyone understands what we’re trying to do. Then, a mistake analysis problem,…

# Completing the Square

Here’s what I’ve used in class this week, mostly to good effect.

# Implicit Differentiation Examples

Here are some example-ish tasks I used to introduct implicit differentiation. First, a warm up, to help students notice and…

# Comparing Explicit and Implicit Differentiation

Here was the original problem from Calc Medic: The thought of comparing two strategies made me think of the Compare…

# Mistake+Example for finding the distance of a trip

This mistake came via Bowman Dickson: Here is the example/mistake that I came up with for sharing with students: I’m…

# Faded Practice with Equations of Lines

I took these images from the Kuta Software worksheets (actually the answer keys) and am turning them into some faded…

# Finding the Constant of Proportionality

Looks like I took the table from the lesson summary from one of these lessons and wrote an example activity…

# Solving Equations that have fractions

Here are two worked-out strategies, in the spirit of Compare & Discuss — a great site for worked example activities.…

# Inscribed Angle Mistake

Here’s one of those mistakes that crop up every year. When I hit one of those, I try to “call…