Larry Ferlazzo’s Websites of the Day…

…For Teaching ELL, ESL, & EFL

The Best Online Resources For Teaching The Difference Between Correlation & Causation


The difference between correlation and causation is an important concept in IB Theory of Knowledge, and I thought readers might find it useful to see some simple fun ways I use to teach the concept.

I’ve used the first two, and the last one — a video — is one I just learned about . I haven’t decided if it’s helpful or just weird, though. Let me know what you think…

Here’s a great comic from xkcd:


via Spurious Correlations

The Internet was awash
recently in discoveries made by Tyler Vigen, who wrote a computer program that discovers strange correlations and publishes them on his blog.

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Author: Larry Ferlazzo

I'm a high school teacher in Sacramento, CA.


  1. Hi Larry – I’ve seen the xkcd, but not the others. Thanks. Here’s a cartoon on the same subject I did last spring –

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