I’ll admit, I was really nervous about teaching Transformations in Honors Geometry. It was a topic I didn’t remember learning myself and I had never taught it before. I luckily had the #MTBoS and especially Michele Torres (@Teachmathtorr).
I start teaching transformations in geometry and I’m pretty nervous because I’ve never taught it before, and I honestly don’t remember learning it. Any tips? #mtbos
— Marissa G (@viemath) September 10, 2019
Lots of people suggested using things like patty paper and Miras to help learn the different transformations. Unfortunately, I do not have access to those and I’m trying to not buy a lot of things this year for my room, so I hope to one day be able to use those. Instead, I did a lot more Desmos than I ever thought I would! If you haven’t seen her Geometry Desmos Activity document yet, be prepared to blow your mind here: https://docs.google.com/spreadsheets/d/1m82reYFkQZtjnptTWo0_G0k6Kmbc7jjo-OFjT3l0wMY/edit?usp=drive_open&ouid=104053001916447058622
I also loved the advice to focus on points transforming instead of the entire shape – it really helped my students who were having trouble visualizing the transformations.
We started with a Polygraph. I’ve noticed that in an honors class, I don’t get too many that get it wrong when they’re trying to find the graph. Instead, they just use a ton of questions. I challenged them to try to use the least amount of questions.
We also started off with some Des-Patterns.
After learning all the transformations, I think my learners would agree that this Multiple Transformations Check Desmos activity made the biggest impact. I had them work in pairs and had them do the worksheet first and then check with Desmos. This was really a turning point for the class. A lot that thought they didn’t know were able to confirm that they really did, and it was also much more apparent to them if a transformation was off than when they did it on paper. My struggle sometimes with having students check in Desmos is that when I try to project the summary, the names have to get so small as I zoom out so I can fit everyone. Sometimes I forget that working in pairs not only helps them learn and have awesome math conversations but also just makes them have fewer names to look for.
I somehow ended up with three free days before Fall Break and they had already taken a quiz over transformations. I wasn’t ready to start a new unit (congruent triangles) right before a two-week break. I had remembered Mandi Tolen’s Global Math Department Presentation and thought to look for anything she shared. She did not let me down.
I modified her assignment a bit. Here’s what I did:
- Create Your Superhero Template (Google Drawings): https://docs.google.com/drawings/d/18sTdL1DxogSjdk8Xlh6g31J1oEMEukpNkYiHuS3lVuA/copy?usp=sharing
- Template for Superhero Transformations (Google Slides): https://docs.google.com/presentation/d/1eIdgqzr7I0Jn7GCWSB_wM_7XgEti7YG0cxUnz1dfCaY/copy?usp=sharing
- Include a few of Mandi’s examples from her site.
- Post on Google Classroom
This was a blast for the learners to work on and for me to grade. My biggest advice is to encourage them to make a plan for their story first. A lot of them spent the entire first day just making their superhero and other images. Even though that really brings the project to a higher level, it also made them have to work on it outside of class and that was never my intention. Also, I learned that demonstrating some of the shape and arrange and grouping tools to the whole class at once isn’t good enough. Instead, make an expert at each group and have them be the ones to ask after that. Also, next year I would like to add a peer review component. I hope that will save some of the ones that decided to wait until the last minute or not do it at all. Any advice on what to do when you’re giving 3 days and nothing is getting done by one or two students? I don’t want to be too hover-y, but I also had my smiles turn to frowns a few times when I had to give a couple learners 3/35…
This twitter thread below has a bunch of pictures from my projects. These weren’t all 100%s and I only included one page of the comics, but I just loved how they were able to show their understanding in a cool creative way that most of them are really proud of.
— Marissa G (@viemath) October 7, 2019
La créativité de mes élèves m’impressionne!