# Tag Archives: estimation

## How I Use “Between Two Numbers”

I’m overwhelmed by the number of teachers who have asked how I use Between 2 Numbers (B2N) in my class. So this post is for all three of them and for anyone else who might be interested. It has become one of our regular warm-up routines. (We do visual patterns and math talks, too. Duh.) Before […]

Posted in General | | 3 Responses

## Between 2 Numbers

I created a new site, it’s called Between 2 Numbers. From the About/Contact page: The inspiration for this site came from John Allen Paulos’ book Innumeracy. I read the book back in 2008, but reading it again this past summer reignited the inspiration and turned it into fruition. In my lesson plan spreadsheet, I started a […]

Posted in General | | 5 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 | | 5 Responses

## Rates and Proportional Reasoning

I’ve been hyper focused on “rates” and “proportional reasoning” for a project I’m working on. Not that one has to look far and wide either, unit rates and proportions are all around us. We intentionally and inadvertently compare things. (HA! I didn’t even realize what this product was until I’m cropping and re-sizing them for this […]

Posted in Course 1 (6th Grade Math) | | 2 Responses

## Prices, Proportions, Percents

I was in Garden Grove with my son on Sunday, and he insisted that I try this smoothie place called Tastea. With Jamba Juice and Blenders and all the other juice bars around town, I was skeptical that this joint’s concoctions would be anything different. He ordered a taro milk tea and I got a Thai […]

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

## 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 […]

Posted in Course 1 (6th Grade Math) | Also tagged , , , , , | 4 Responses

## Equilateral Triangles

Thank you to Dan Meyer for this great task idea on equilateral triangles. Act One is this video which asks for a ranking of how well each teacher had drawn his equilateral triangle. But as soon as I saw the video, two thoughts came up: We’re in a 0:1 classroom right now, and having the whole class come […]

Posted in Geometry, Problem Solving | | 2 Responses

## Last Math Lessons

On the first day of school, I promised all my students that I’d do my best to make math relevant and challenging. I also promised to never waste their time, therefore they could expect to do math every day in my class, including the last day of class. I did not promise them that math would be fun […]

## Visualizing Volume is Tricky!

This was one of those lessons that I think I gained a lot more than my 6th graders did. It was meant as a one-period activity, but I kept going off on different tangents and brought the students along for the ride. Over a month ago Andrew (@mr_stadel) tweeted me a picture that he took of a William Sonoma display of their […]

## Area of a Circle

After finding the formula for the circumference of a circle, my 6th graders were ready to work on finding the area of a circle. I asked them to draw a circle on notebook paper, any size, but not too small. Then I gave each a centimeter cube to trace one face onto their paper to remind them how much the area of one […]

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