Time's "Can Time predict your politics?" by Jonathan Haidt and Chris Wilson

This scale, created by Haidt and Wilson, predicts your political leanings based upon seemingly unrelated questions.

Screen grab from time.com

You can use this in a classroom to 1) demonstrate interactive, Likert-type scales, 2) face validity (or lack there of). I think this would be 3) useful for a psychometrics class to discuss scale building. Finally, the update at the end of the article mentions 4) both the n-size and the correlation coefficient for their reliability study, allowing you discuss those concepts with students.

For more about this research, try yourmorals.org