Quadratics and Complex Numbers
Hyperlinked lesson names have blog writeups about them.
Falling Rocks and Glowsticks

I'll write about this one when I have some spare time.

Penny Circle

I use this in conjunction with Dan Meyer's Penny Circle 3 ACT lesson. I found the Penny Circle too difficult for my Algebra 1 students without a bit of scaffolding. My Algebra 2 students could do it after working with matrices. Here's the handout I use to help the students walk through the thinking process.

After three days of working on this task, Algebra 1 students are transforming quadratic functions to fit real data. Brilliant!

Have students come up with Quadratics

It's a simple enough concepthave students come up with quadratic equations which match the given criteria.

At this point, I've already introduced y=a(xh)^2+k using desmos. My goal is to get students to use the idea of transformations to fit quadratics to messy data. For that I have three examples.

Quadratic Posters Project  Algebra 1

I use this as a summative assessment for my Algebra 1 classes.

This activity is more for Algebra 2. The goal is for students to make a table of data and look at differences to tell the degree of the polynomial function. From there, students create a system of equations and solvepreferably using matrices.

I coopted this from 8ismyluckynumber. I made some changes to better fit my students. If your thinking about doing this with your class, I suggest reading my post about it (linked on the left).

This was a fun crossover of physics and math class. All it takes is some meter sticks, masking tape, steel balls or large marbles and a wee bit of tech. I loved this lesson for an Algebra 2 class. It's too much for Algebra 1even the advanced ones.
