Tag Archives: algebra

129 – finding the border of a picture frame

My algebra kids are learning to write a quadratic equation to help them solve this problem from mathisfun.com: But first I made them figure it out by physically cutting a 28-cm2 frame to evenly surround a 6-cm by 11-cm picture. I blogged about it here.

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121 – graphing quadratic functions

Algebra students used Desmos today to see how the coefficients a, b, and c affect the shape of the parabola.

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96 – stacking cups

My algebra kids finished up Stacking Cups from Dan Meyer. It took 3 full periods. I wrote about it here.

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92 – ASN in geo and baker’s choice in alg

I typed up these 16 statements from the geometry textbook for kids to work in groups and determine if each statement is Always, Sometimes, or Never True. It’s so lovely to hear the discussions among kids with these ASN activities. My algebra students are just starting the “Baker’s Choice” Linear-Programming activity. I asked them to write down all the information they would […]

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84 – the case of the missing laundry

My algebra kids are just beginning The_Case_of_the_Missing_Laundry. It’s great fun!

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35 – distance problems

In our Glencoe algebra textbook, D=rt problems are lumped in the same section as Mixture problems. I get it. And I don’t. Maybe I’m kidding myself or in denial, but this year I’ve been saying this phrase a lot in class: Do what makes sense. I’m tired of using tricks, mnemonics, pre-made grids to help kids learn. Like […]

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27 – always, sometimes, never

I wrote about this lesson last year here when I did it with the 6th graders. Today I’m using another set for my 8th grade algebra kids. I like the dialogue that the kids have when they’re deciding where to place the equation — Common Core Math Practice #3 comes to mind: construct viable arguments and critique the reasoning […]

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