Love the Sliders!

Today I was working on a lesson plan on the quadratic formula.  I ran across this activity called Doing What Mathematicans Do published by The Charles A. Dana Center at The University of Texas at Austin in a resource called Algebra 2 Assessments.

As I thought about the activity where students play with different values in a quadratic equation, a, b, c, I wondered how we might use Desmos.  So I spent a few minutes at that site.  I typed in the standard form of the quadratic equation, ax^2 + bx + c.  Desmos asked me, sliders for a? for b? for c? for all?

And I was sold!

I can't wait to share this activity with my students!