Prime Factor Stacks

Carol Cashion, teacher of math and other high school equivalency subjects at the New York City College of Technology in Brooklyn, and I co-led this meeting. In October, I observed Carol’s class when she introduced factors using blocks. I was interested to see how the approach opened up a tangible way of playing with factors and concepts such as greatest common factor. In our teachers’ circle, Carol explained her lesson plan and then we explored “prime factor stacks” as a problem-posing and problem-solving method. -Eric

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Function Diagrams

I decided to lead a meeting on function diagrams because I’m intrigued by the possibilities of teaching with them and because I wanted to introduce the resources that the math educator Henri Picciotto makes available. I have to admit that I haven’t spent that much time thinking about to teach with function diagrams, but I was interested to see what we can learn together by exploring this visualization. 

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Celtic Knots at COABE 2023!

Mark and I led a hybrid in-person/virtual presentation at the COABE conference in Atlanta, GA at the beginning of April. Since then, new people have joined our mailing list and a recent meeting on April 18th. We’re happy to have you as new members.

You can watch the recording of the meeting below. The padlet mentioned in the meeting (with links to Celtic knots and related tools) is here: https://bit.ly/CAMICOABE2023. Enjoy!

Billiards!

Today we looked at a problem involving rebounding balls on a billiard table.

The rules of our problem:

  • A “table” can have different dimensions (measurements of height and width).
  • A “ball,” modeled by a straight line, is launched at 45 degrees from the bottom left corner of a table.
The ball always starts on the bottom left and goes up towards the top right at 45 degrees
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Story Tables

In this meeting, Amy introduced the story table, which is a teaching tool for solving algebraic equations. Story tables allow us to use guess and check and then analyze patterns in the results, in order to find values of x that make equations true.

To get us started, Amy shared the following algebraic equation:

3x - 2 = 10

And asked us to tell the story of x. To find a solution in this story, Amy asked us for the moment not use other ways of solving equations.

Getting started with story tables
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What Comes Next?

Sarah and Eric have been teaching themselves how to code using Javascript, CSS, and HTML. The What Comes Next? game is the result of more than a year’s work. We are not fast coders! We used this meeting to share our game and to see if teachers might use it with their students.

To play the game: What Comes Next? 

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