In this activity students must decide the best method to solve the system of linear equations. It is not required to actually solve the problem, but to have a conversation and make a decision on the optimal method. Aligns with the Standards for Mathematical Practices!
How the activity works:
This activity is similar to "four corners." Post the signs for the three methods on three different walls in the room. Show students one problem at a time. Students must decide which method they would see best to solve the particular problem. Have students move to the correct side of the room and share their reasoning in the group. Then, have students support their reasoning. Good conversations come from identifying which method students prefer and which method is the optimal choice.