I began this post on Friday night in Hamburg Germany, near the end of ICME, the quadrennial international math-education conference that's been both exhilarating and exhausting. I’m now finishing it on the airplane headed back home.
As interesting as many of the presentations have been, they've also been … Continue Reading ››
For this year’s Pi Day post, I thought I’d continue our Web Sketchpad
(WSP) construction theme. But rather than adapting the visualizations from last year’s Pi Day post
to the new construction capabilities, I decided to take a different approach. Some time ago, I built a set of custom tools … Continue Reading ››
I recently got a question from a question from a user about how to line up text objects. The question was both about lining up objects on a page, and about lining them up from one page to the next, so that when you switch pages things are in the same place on every page.
As … Continue Reading ››
At the 2013 Baltimore Regional NCTM Meeting, I gave a presentation on Picturing Functions and Functions of Pictures.
In the description of my presentation I’d promised to show how to use Sketchpad to create special effects, so when it came time to prepare, I figured I needed to deliver on my promise. So I wrote a … Continue Reading ››
I’m excited to be making my first presentation of the 2013-14 school year next week in Baltimore. Daniel Scher and I are presenting Picturing Functions and Functions of Pictures
. We'll be discussing the connections between pictures and functions. These connections are even richer than I realized when I first began to work with pictures in Sketchpad. In the … Continue Reading ››
, it is very easy to start from scratch and create a polar graph. Here are the steps to create the graph shown on the right below.
- Choose Graph | Plot New Function.
- Use the Equation menu to choose r = f(θ).
- Type "c" (for "cos"), "2", and "th" (for "theta").
- Click OK.
- If your … Continue Reading ››
Today I leave for my first proper vacation in a year and a half. Last time I took such a vacation, Key sold its high school textbooks to Kendall Hunt and transformed from a publishing company to a educational technology company. This time I just hope to survive the end of the world. 🙂 Before … Continue Reading ››