This multi-step equations Harry Potter Duels activity is a collaborative activity.
In this activity, each group will be given one page and each page has four multi-step equations. This activity works best if students are in groups of 4 so that each student answers one question on each page. They will match their answers to the solutions given to them in order to form a sentence relating to Harry Potter. Once completed, students will bring their answers to the teacher for checking. If correct, they are given the next page of problems. If incorrect, they must go try to find their error and correct.
I usually make this a competition between groups to see which group can complete all 8 pages of problems first.