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How People Spend Their Day
Flowing Data has an excellent set of interactive graphs showing how Americans spend their day. It's an interesting look into modern American culture. Main takeaway: we spend most of our time sleeping,...
View ArticleHow to Make Good/Useful Graphics
Flowing Data has a nice post that gets at how to make good images of data. It's called, "5 misconceptions about visualization". The misconceptions: Visualization is for making data flashy Software does...
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Everything You (N)ever Wanted to Know About Parabolas
So that my students could more easily check their answers graphically, I put together a page with a more complete analysis of parabolas (click this link for more details). Analyzing Parabolas Standard...
View ArticleThe Algebra of Straight Lines
A quick graphical calculator for straight lines -- based on This. It's still incomplete, but it's functional, and a useful complement to the equation of a straight line animation and the parabola...
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Practicing Plotting Points on the Co-ordinate Plain
Pre-Algebra class starts next week, so in preparation for one of the early lessons on how to plot x,y co-ordinates, I put together an interactive plotter that lets students drag points onto the...
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Ecological Footprints: If the World Lived Like …
What if the entire world population lived like the people in Bangladesh? The amount of land to produce the resources we’d need would take up most of Asia and some of Africa. On the other hand, if we...
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And the Snakes Ate the Birds who Ate the Spiders
The introduction of snakes to Guam has reverberated through the ecosystem. Accidentally introduced to the island in the 1940s, the snake decimated the island’s native bird species in one of the most...
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Introducing Polynomials
If you recall, straight lines have a general equation that looks like this: (1) This is called the slope-intercept form of the equation, because m gives the slope, and b tells where the line intercepts...
View ArticleEmbeddable Graphs
Going beyond just polynomials, I’ve created a javascript graphing app that’s easily embeddable. At the moment, it just does polynomials and points, but polynomials can be used to teach quadratic...
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On Enzymes and Temperature
While discussing homeostasis in biological systems, one of my biology students asked why humans could only survive with only a very narrow range of body temperature. Part of the answer is that the...
View ArticleEmbedding more Graphs (using Flot)
Here’s another attempt to create embeddable graphs of mathematical functions. This one allows users to enter the equation in text form, has the option to enter the domain of the function, and expects...
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Calibration Curves for Salt (NaCl) Solutions
Calibration curves produced by different student groups to determine the relationship between density and concentration of salt (NaCl) solutions. To start with chemistry class, we’re studying the...
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