Posted in Activities, Application, Geometry, Scale Factor

Honey, I Shrunk the Classroom

I saw this activity on Facebook last year. I don’t know who the teacher is, but the project is posted on North Central Parke Community School Corporation Facebook page.

I created the instructional slide below to facilitate the process with my students. Students had to select an object in the classroom to enlarge or reduce. They needed at least 5 measurements (many students took a lot more than that) and they had to select a scale factor. I provided some supplies but they were welcome to bring others from home. The project had to be completed in the classroom and they had to collaborate with at least one other person.

My students were so engaged, they worked very hard, and they were so proud of their results. Not to mention, they had some a-ha moments during construction. One student in particular made the connection that angles are the same in scaled objects even though the sides change. Now we had investigated and discussed this learning target, but it became evident to her when she was working on her object. YAY!

Dilation Project
click on image to see a template of the project

The first photo gallery includes process photos. I documented our progress on Twitter each day.

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The last photo gallery shows the results. They did an amazing job. This is definitely a try again next year project.

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Posted in Activities, Application, Geometry, Scale Factor

Far Side Expansion

I have been doing this activity LONG before computers were a staple in the classroom. (We won’t talk about how many years that’s been!) I love this project now as much as I did when I started.

I used to have a Far Side by Gary Larson desk calendar and each year I would keep the images and use it for this project. I don’t buy the desk calendar anymore, but you can find Larson’s comic’s online.

I take the comics and cut them equally into 3-4 congruent parts (depending on my groups).┬áStudents must work in groups of 3-4 to decide on a grid size for their original and a scaled paper size and grid size. Once they’ve worked together to draw this in, they start sketching their drawing box-by-box. We spend about 4 -50 minute class periods on this project.

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The students have a lot of fun with this and are proud of their product when finished. It also reinforces teamwork. When one person doesn’t complete their part, a picture is hung up for viewing incomplete. So sad.

Here is the planning guide I use for this project. If you use it, post about about it on Twitter, and tag me @MandiTolenEDU.