Today in Algebra, students started with Estimation180. We have been slowly working our way through the first three days, then this happened:

After students worked through Crossing The River which is out of Mark Droscoll’s *Fostering Algebraic Thinking*.

What steps do you find yourself repeating over and over and over and over?

For some reason I just can’t get enough of this problem, I have been using it before I was a preservice teacher. The objective of the day was to introduce creating and solving two-step equations but students went well beyond my expectations. Here are some of the scaffolding questions I used to build up to our final equations.

Stretch student’s thinking; it is painful to draw out pictures for 100 adults. I told em the next question I was going to ask was 559 adults.

We talked about how Algebra makes our lives a whole lot easier.

But what does the equation mean…?

Has anyone ever seen an equation like this?

It has more than one solution… why’s that? Kinda weird.

I was too excited today to take pictures of student’s work, there were some awesome solution methods out there though! Tomorrow I am going to follow up with a quick review of two-step equations then some practice problems.

In Geometry students had a work day and practiced problems on various pairs of angles/angle addition postulate. They were cranking the problems out today. I like to give students one day a week to work through problem sets in class instead of assigning them as homework (more to come on how we do homework in a future post)!

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