[If you're not interested in absolute value, there is a pretty funny story about a 3hole punch at the very end. Or, maybe it's not funny. Maybe it's sad. Either way, it was a memorable experience.]
This week, I started introducing the concept of absolute value to my Algebra 1 students. Our Algebra 1 textbooks introduce the concept of absolute value in Algebra 1. It introduces graphing absolute value equations in the same chapter where graphing linear equations is taught. Of course, I don't use the textbooks. I keep one by my desk as a reference, but the rest of the books are collecting dust on my shelves.
This summer, I had planned to introduce absolute value using the textbook sequence. I even created some pages for my students' interactive notebooks.
I never used this page, though. Actually, I decided it was in the best interest of my students to postpone discussing absolute value until later in the school year. When I started working with my students at the beginning of the year, I realized just how low many of them were. There were a lot of middle school math topics that I had to reteach. So, I made the decision to take certain concepts and postpone them until later in the school year. I was hoping that if I refined my focus I could build up my students' math levels and make them more confident. Then, with more confidence, we could start looking at concepts such as fractions, absolute value, probability, etc.
So, Monday was my students' first experience with absolute value in Algebra 1. A few students who took Algebra last year knew what absolute value was. A few others wrongly described absolute value as meaning the opposite. They thought it meant that you just changed the sign.
My students had been working really hard at multiplying binomials and factoring quadratics for the past two weeks. Test scores were not exactly where I had wanted them, but at the same time I was proud of my students because I have seen them grown an incredible amount since meeting them in August. In August, I would not have thought that my students would be factoring quadratics with a leading term greater than one. But, we've gotten here. We still need some more practice with factoring, but we will continue reviewing it and practicing it for the remainder of the semester. And, it was a Monday. So, I decided to kinda ease into our absolute value unit using the
Estimating Age activity from Dan Meyer's Algebra Curriculum (Week 3.)

Estimating Ages Chart 
I picked 15 of the celebrities from his file. I used their birthdays to calculate their current age. I typed up a halfsheet of paper for students to record their guesses. It's not perfect. After using it once, I realized that I should have added a fourth column for students to record the difference between the actual age and their guess. I don't know if it would be of use to anyone, but I have uploaded my file below.
Sarah  the Graphing Absolute Value booklet was exactly what I needed!! Thanks so much for sharing your experience. This is my 13th year teaching middle school math, but my first teaching Algebra, and your blog has really been an inspiration as well as a great resource.
ReplyDeletey 13th year teaching middle school math, but my first teaching Algebra, and your blog has really been an inspiration as well as a great resource.
ReplyDeleteReply
LOVE the activities, especially the age guessing game. I'll bet they will remember it for sure. And the award story is pretty funny (yet, sad...). And WOWhow do they not know what a 3hole punch is??!! Great post! :)
ReplyDeleteJanaye
Tales of Frogs and Cupcakes
Love your blog!!! This is my first year teaching and have incorporated interactive notebooks halfway throughout the year and just am so grateful I found your site. I teach PreAlgebra as well as advanced Algebra. Great post along with many others:)
ReplyDeleteThanks, Lindsey! I'm glad my blog has been a resource for you!
DeleteYour story at the end might explain why SOOO many of my students always shove stuff into the pockets of their laptop cases instead of into the required binder. And seriously think they are on top of it.
ReplyDeleteHa ha :) None of the teachers at my school have the students keep binders, but I imagine our students would do the same thing!
DeleteI like the Celebrity Age/absolute value activity. My students will only be responsible for identifying a number, its opposite, and it's absolute value. I think this activity would be a perfect for the objective and I like how it relates to the real  world.
ReplyDeletePerfect fit
DeleteGlad you like it!
DeleteI don't see the embedded Absolute Value foldable. Help! I swear I saw it last week when I first bookmarked this page. I love both that one and the translations page. I can't find either one now! Thanks!
ReplyDeleteEmbedded files stopped working for some reason. :( Here's a link: https://app.box.com/s/05n96cniwjoljhn6kq7bwz824r183dul
DeleteI found a complete Celebrity Age guessing powerpoint complete with answers (done in the context of scatterplots, but you wouldn't have to use it that way).
ReplyDeletehttp://mathbits.com/MathBits/PPT/EstimateAge.htm
Awesome! Thanks for the link!
DeleteHi, Sarah! I love your blog! I get so much help from it!! I can't find the file for the absolute value transformations page that I see above. Could you send the link? Thanks!
ReplyDeleteI found another copy of it here: http://www.ciclt.net/ul/okresa/Unit%206%20Acquisition%20Lesson%201%20Absolute%20Value%20Functions.pdf
Delete