Tag Archives: estimation


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

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) | Also tagged , , , , , , , , , | 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 | Also tagged , , , , | Leave a comment

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 […]

Posted in Algebra, Course 1 (6th Grade Math), Geometry, Problem Solving | Also tagged , , , , , , , , , | 2 Responses

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 […]

Posted in Course 1 (6th Grade Math), Geometry, Problem Solving | Also tagged , , , , , , , , | Leave a comment

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 | Also tagged , , , , , , , , , | 3 Responses

Why Wait for Calculus?

(I just had my very best lesson yesterday, on a Friday, thank you. I feel almost brilliant right now. And I only feel like this once every 47 years, so please stay and read this post!) My own kids tell me they will stock up their dorm rooms and apartments with junk food and soda when they move out […]

Posted in General, Geometry | Also tagged , , , , , , , , , | 4 Responses

I am a doughnut.

I cannot eat a doughnut without thinking of Eddie Izzard. Language caution in this video clip. Ich bin ein Berliner aside, I needed a calorie-laden lesson for my 6th graders to welcome them back into the classroom after two wonderful weeks of spring break. (We are also two short weeks from state testing and should be reviewing for the test. […]

Posted in Course 1 (6th Grade Math), Geometry | Also tagged , , , , , , , | 2 Responses