I shared here part 1 of our unit on systems of equations -solving by graphing and by substitution.
I started this unit with the following warm-up.
Then I followed it up with this notice/wonder.
One of my students this past year noticed that, “These are like the problems we did for warm-up.” I love when my students notice connections between the warm-up and the lesson for the day and that I’m not just having them do random stuff.
I was really pleased with how this led nicely into the lesson for the day. Students noticed that in each problem there was a zero. They were able to tell me why that happened. When I told them that this is another method for solving systems of equations called elimination, at least someone in each class was able to explain why they thought that elimination was a good name for this method.
It had been a while since we had done Vertical Non-Permanent Surfaces, and these problems work great for that.
The last part of this unit was having students choose the best/most efficient method for solving a system of equations.
I started with this Desmos Activity. I didn’t have students solve the systems the first day. I wanted them to just think through what method they would want to use to solve each. The next day they actually solved some of the systems.
I’ve uploaded some of the worksheets and notes I used from this unit here.