I am teaching a lesson about the different way to use the function machine (know the IN column and the rule and having to find out the OUT column, vice versa. Also, not knowing the rule and having to figure out that etc...).
Has anyone taught this? It is lesson 3.1 in the 4th grade EDM book. I wanted to introduce it with a fun model but can not think of way. Something that shows one thing going in and something coming out. But it is hard because I can't apply the "rule" to it.
I was thinking showing them 10 cents and they get a jelly bean. Then 20 cents and they get two jelly beans. But I wish I could put it IN to something and the jelly beans come OUT!