A cartoon suitable for use in discussing the validity of indexes constructed to be relevant for a concept. The cartoon is number 1571 (August, 2015) from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license.
A quote to help in discussing the idea that a plan for the purposeful collection of data should include a plan for how the information will be used. The quote is by American philosopher, educator, and feminist Anna C. Brackett (1836 - 1911) and may be found in The Technique of Rest, Ch. 2 (1892).
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A game to aid in teaching experimental design and significance testing (especially one sample, two sample, and matched pair situations). Tangrams are puzzles in which a person is expected to place geometrically shaped pieces into a particular design. The on-line Tangram Game provides students the opportunity to design many versions of the original game in order to test which variables have the largest effect on game completion time. A full set of student and instructor materials are available and were created by Kevin Comiskey (West Point), Rod Sturdivant (Ohio State University) and Shonda Kuiper (Grinnell College) as part of the Stat2Labs collection.