Operation! I'm the Doctor for You!

Last year when working with order of operations, I had a fun idea to have the kids look problems that were wrong, and fix them. When setting it up I drew the large pictures of patients who were sleeping. On each one I placed an incorrect problem and had the kids move around the room and ‘fix the patient.’ This year, in fourth grade I don’t go as in depth with that concept. However, my students are getting their first go at both long division and multiple methods of double digit multiplication. So it seemed like a good time to pull this activity out of my pocket and put it into practice.

I set up six stations; three with long division mistakes and three with multiplication mistakes. For multiplication I opted to use both the standard algorithm and the box method. The mistakes I highlighted were the same mistakes I had seen from the students. The students that had displayed a good understanding of the process through exit tickets and class practice could move around freely as they diagnose each patient and complete the problems correctly. The few students who were still having troubles would work with me to complete the six problems first, and then they could match the work to the patient and figure out what they did wrong.

On the day of the activity I had students fold a piece of paper in half. One half of the paper was for their diagnosis and the other half was to complete the problem correctly. The free moving students worked very well moving from one station to the next. One or two of the problems stumped the students because the mistakes were tricky to notice. Every student got through at least five of the six students. Working with the students who had difficulties also seemed to go really well.

That said, we only had about 35 minutes to complete the activity. So I was not able to get through all of the equations with the students I was working with. Also, while I had time to go over the answers, I did not have enough time to go in depth with the mistakes in the problems each patient had. I have already noted to myself the need for a full class for this activity the next time.

What I like about this activity is that the classroom transformation immediately sets a tone that this will be different. Students usually rise to a different atmosphere. In a dream world they all get scrubs, clipboards and face masks. For a first effort in Ohio, this went pretty well.