This past week my geometry class has been studying surface area and volume. I tried to find an interesting and hands on project because when finding surface area or volume you are basically plugging numbers into a formula. The students were great at that but I don't think they actually understood what surface area meant. So I found this tin man project on another teachers blog!
For about two weeks my mentor teacher and I had been collecting other peoples "trash" aka toilet paper rolls and small boxes. (Big thanks to everyone who gave me supplies!!)
The materials included:
1box- prism
4 toilet paper rolls- cylinder
1 balloon- sphere
1 paper cone- cone
scissors
tape
glue
ruler
I had been excited about this project for a while and it worked out perfectly that this day would be my evaluation day! My mentor teacher allowed me to plan and teach this project all by myself. She said that she would be in the classroom and help out while I led it. Unfortunately she got sick and I got a text the night before saying that she wouldn't be in class the day of the project. After I mild panic attack I realized that I could do it by myself and the students would be great (I told myself over and over).
I was nervous about doing group work with my classroom because I had never done it before. Fortunately my first class is very well behaved and worked amazing together! I only had a couple of students complain at first about their partner but once they started measuring they got into the project and moved past that. All of the students were on task and sharing the roles equally. Some measured while the other plugged the numbers into the formula. They all used their creativity!! Some were standing, sitting, flexing, tall, short, or even had earrings!
Only a couple of groups had enough tin foil to cover their robots. We talked about why and discovered that tin foil crinkles up so this was less material for them to use. Many of the students didn't realize that the tin foil needed to be carefully and precisely put on the robots. Many of them wrapped the prism like a gift. This left material overlapping which we discussed that this wasn't calculated in finding surface area.
I think doing hands on activities with students helps them better understand how math is used in the real world. I believe they now have a better understanding of surface area. Working with 3D shapes in class helped them visualize a base or side. They had seen problems on a worksheet that are kind of hard to picture a 3D figure on a 2D piece of paper. My students are used to being told exactly what to do. With a topic like surface area, there is pretty much only one way to solve a problem. By giving them freedom to measure things how they wanted, it helped them problem solve. While students were covering their tin man they realized they had to be very precise. I let them figure this out themselves because if I had told them, they wouldn't have understood exactly why. This presented themselves with a challenge that they had to work through and come up with a solution. This idea of perseverance and problem solving is my goal for my classes this year.
I had them fill out a reflection sheet which asked questions like what was the hardest/easiest part and what would you have done differently next time. Overall, the project was greater than I could have ever imagined. Their robots are displayed in our classroom :)
Debbie Cakes and Mighty Bones