Math Quiz: NYT Learning Network

Through Math for America, I am part of an on-going collaboration with the New York Times Learning Network.  My latest contribution, a Test Yourself quiz-question, can be found here:

https://learning.blogs.nytimes.com/2011/10/03/test-yourself-math-oct-3-2011/

This question is based on Facebook’s claim that they have 800 million users, and asks “What percentage of the world’s population uses Facebook every day?”

Dodecahedron Calendar

Here’s a fun use for a dodecahedron:  folding it up to make a yearly calendar!

https://texample.net/tikz/examples/foldable-dodecahedron-with-calendar/

Just download the PDF, print, cut, fold, and glue!  Access to a large-scale plotter might be nice, as the 8.5 x 11 version folds into something that’s pretty small.

It’s too bad there aren’t eight days in a week, otherwise we could put the octahedron to use, too!

Math Lesson: Analyzing Economic Measures in a Downturn

My latest contribution to the New York Times Learning Network is a math lesson built around gathering, representing, and analyzing economic indicator data.

https://learning.blogs.nytimes.com/2011/09/28/nowhere-to-go-but-up-analyzing-economic-measures-in-a-downturn/

By getting data on Real G.D.P., personal income, corporate profits, and unemployment from official sources like the Bureau of Economic Analysis and the U.S. Department of Labor, students explore positive and negative correlations between the various economic indicators.

In addition, students can explore the relationships between graphs of quantities and their rates of change by creating and comparing graphs of percent change.

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