A short followup to the post Two Ideas for Introducing Functions.
Yesterday I discovered another payoff from the hilariously gruesome Meat-a-Morphosis video: a powerful and memorable analogy for Inverse Functions. Imagine if we ran the machine backwards - if we put chicken nuggets in and the original chickens came out? My students thought this was hilarious.
|Inverse Functions: What if you put in nuggets and out came chickens?|
Image adapted from original at Meat-a-Morphosis ( Patty Hill & Michael Word)
Even more fun: for students still coming to terms with f(x) notation, faced with this:
doesn't this convey the same idea even more clearly?
|Put a chicken into the nuggetiser, then into the de-nuggetiser and you get back your chicken |
(OK , maybe with few ruffled feathers and a lot of squawking!)
Who would have thought there was so much laughter in a lesson on functions? Thanks to the Meat-a-Morphosis team at Kealing Middle School, Austin Texas for a wondeful teaching resource.