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A. Marie Pool wrote:
I need something to catch my students attention the first day of
school.
Suggestions?
I have a fun assignment for the first day that I have used to get
discussion going, and to introduce scientific thinking. After I go
through the syllabus, I ask if there are any questions (which there
never is), and so I say, "Well, I have a question. I would like to
know
how those automatic flushing toilets work. You know, the ones that you
go to the bathroom, get up, and *flush*! It somehow 'knows' when to
flush. How do they work?" . . .