I had a question about how AP readers would grade an AP Statistics question. The story below is how Twitter helped me get the answer, in great detail, within a couple of hours. Twitter: you are awesome. (AP Stats exam, in some ways you are less awesome. Some of your obsessions make sense to me.Read More

## Geometry Theorem Posters

I asked twitter if anybody had any geometry theorem posters, but no response yet. So I decided to make my own. These are numbered using the number scheme from my rather ancient textbook, so you’ll probably need to modify to use them in your classroom, but if you like them as a start, feel freeRead More

## Ho’s and Ha’s and Other Claims

Hypothesis Tests are big part of most statistics curricula, even as they have somewhat started to fade from favor in the statistics world at large. One of the reason I think for their slow fade is that they are often pretty easy to do while not understanding. There are many ways to help with this, andRead More

## Exploring the “Large Population” rule – a problem to aid students

In my last post I explored the “Large Population” or “10%” condition for statistical inference using the traditional formulas, specifically as it relates to proportions. After much twitter conversation, I am coming around to the point of view that this should be explored deeply with students, if possible, as it will generate good conversations about precision, samplingRead More

## Using simulation to understand a statistical rule of thumb

Inspired by Bob Lochel’s beautiful investigation on when binomial distributions appear normal, I started exploring, for myself, the other rule of thumb in statistical inference: the “Large Population” or “10% rule”. For the uninitiated, a (very) brief explanation. Consider a population of 10 people where 70% of them like chocolate chip cookies – that is, 7 people.Read More

## How a tiny connection in geometry made me feel like a master teacher

[latexpage] This is my eleventh year teaching. And I’m starting to realize that I may be finally starting to develop, at least partially, into a “master teacher.” I cringe a little bit at that description – I mean, I still forget to take attendance pretty much every class, and sometimes there’s still just no lessonRead More

## Exploring quantitative data via simulation

I’m working hard on the CPM Statistics text, but I want to take a break from generating new lessons and content to talk about a sequence I just finished writing for the text that I’m excited about. This sequence occurs near the end of the year – students have learned about sampling distributions, confidence intervals,Read More

## Politics

I’m not dealing well with this election. I haven’t been able to grade papers, or lesson plan, or work on writing my fall exams; all I’ve been able to do is read and ruminate, with some breaks for computer programming (one of the few tasks that has the power to distract me long enough forRead More

## CPM Statistics Pilot – a preview and review, one quarter in!

This summer (and in the evenings now) I worked as a contributing author for CPM’s new Statistics textbook. This semester, while writing lessons for the second semester at night I’ve been piloting the first semester during the day. One quarter of the year in, this is my review and preview post! For those who might notRead More

## Why I’m trusting my textbooks more this year

The MTBoS has changed so much about how I teach and so much about how I think about teaching.This year I am using number talks, visual patterns, Desmos activities, and other things that I would not know about or be comfortable with without the MTBoS, and I stand forever grateful for that. But as IRead More