I started talking about this last week when I was reviewing functions with my Algebra 2 class and it took on a life of its own in my mind. When we were discussing input and output it made me think of a gumball machine. I'm not sure why, but if I had to guess it's because my three rugrats at home cannot pass a gumball machine without hitting me up for a quarter! And since you have to put IN a quarter to get OUT a gumball....that's where my mind went. Because I used it as an example in my classroom, I couldn't very well assign it as a homework assignment or even an exit ticket type question. However, next year, I plan to use it as my output question in my INB. Here is my formal question:
Is a gumball machine a function or not? Why or why not? Please explain/support your answer using mathematical reasoning.
With all the changes that the Common Core is bringing to our curriculum, the one I am trying the hardest to incorporate into my classes is the writing. I am trying to get my students to write more, explain more, and hopefully, understand better. We are working on proper vocabulary as well. In my opinion, I think my INB will help me do this more in my classroom. It certainly is making me reflect more on my lessons at the end of each day. And now I have somewhere to keep those reflections for next year.
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