Tag Archives: ratios

Reversing the Question

Don Steward posted this on Sunday. Like Don, I really like this task and also think it has a certain Malcolm Swan je ne sais quoi about it. I showed only the top part to my 6th graders, and I gave them 2 minutes to write down what they notice. In addition to noticing the given information, the students also mentioned: […]

Posted in Course 1 (6th Grade Math), Math 8 | Also tagged , , , , , | 15 Responses

Greenies

Our black lab Mandy is 3.5 years old, weighs a ton, and her breath used to smell like death. Until we started giving her one Greenies a day. My husband orders them from Amazon, he also gets them for our neighbor’s small dog Bailey. Although both boxes weigh the same 36 ounces, Bailey gets 130 treats in the Teenie size and Mandy […]

Posted in Math 8 | Also tagged , , , , , , , | 5 Responses

Technology and Construction Papers are Cool

Big-time struggles for my 8th graders on this problem from Five Triangles mathematics. The one student who got it also struggled, but he was good about our rule of “never tell an answer.” What I gathered from seeing their boards and listening to them explain: They wanted to find the area of the parallelogram first. So […]

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Sleep On It

This lesson mattress_sizes1 is the result of my spending 4 nights sleeping on a really nice bed wrapped under thousand-thread-count sheets! Part 1: The Mattresses I asked the kids to guess how the size of the little rectangles on paper compare to the real mattresses. (It’s 2% of actual.) We ignored the thickness. Then I asked them what the scale […]

Posted in Course 1 (6th Grade Math) | Also tagged , , , , , , | 3 Responses

One Rod Tall

I’ve written before about reading books to my kids and following up with an activity. I read the poem one_inch_tall to my 6th graders as we’re studying ratios and proportions. One Inch Tall by Shel Silverstein If you were only one inch tall, you’d ride a worm to school. The teardrop of a crying ant would be your swimming pool. A […]

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From Listerine to Fuji Water

I was brushing my teeth. The next evening, after dropping my car off for a nail to be removed from the right rear tire, I killed time at Michaels and Trader Joe’s. I created this lesson relative_ratios from that. My 6th graders are working on ratios and proportions. I saw the three different-sized bottles of Listerine on my bathroom counter […]

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Blaming the British Paper Size

I bought this lovely red book — and the blue one too — from the Shell Centre for Mathematical Education back in 2007 and paid a pretty penny to get it shipped from Nottingham, UK. [07/04/14: This book is now available for free download.] I noticed immediately that the book and the “Masters for Photocopying” were not of the […]

Posted in Algebra, Course 1 (6th Grade Math) | Also tagged , , , , , , , , | 1 Response

Staircase and Steepness

AHHHH, I love how this lesson has turned out so far!! Today was our 3rd day of State testing, and because I have 8th graders for homeroom, we still have three more days of testing next week. Ick. I didn’t want to cram/review again with my 6th graders today, so I thought of doing a lesson on “steepness” (adapted from Swan […]

Posted in Algebra, Course 1 (6th Grade Math), Problem Solving | Also tagged , , , | 10 Responses

Playing with Barbies

I got most of my 20-plus Barbies from eBay, and I make good use of them.  I use the Barbies with my 6th graders when we study proportions, and with my algebra students we do the Barbie Bungee activity when we study linear equations. The students work in groups of three, one Barbie per group.  […]

Posted in Course 1 (6th Grade Math) | Also tagged , | 1 Response