After my immensely popular tweet of these pictures:
I figured I should blog about what we did for function notation in my class. We made this slider for our notebooks. The files can be found here. They are 3/page and 6/page with dotted lines where you need to cut. You will need to download into word for the files to be formatted correctly. We glued the top and bottom of the pink one down, so that the brown can slide. (Side note: 9th graders might need instruction and assistance with cutting the isolated slits on the brown one.) On the right side of our notebooks we worked through each different input value and simplified as much as we could.
The next day we did a quiz-quiz-trade activity. This helped students gain confidence. After doing four problems quiz-quiz-trade style I gave them one to do individually and went around checking their work. I did a quadratic to make sure they were simplifying exponents BEFORE multiplying. If students didn't have it correct I could give them some quick feedback, they would fix it, and I would check it again.
There's more to what we did (and are still doing), but that's all I feel like blogging about now. Thanks for all the encouragement via my tweet. It was amazing to see the power of twitter in that another teacher (in another country) took the idea and improved it and used it THE VERY NEXT DAY! My students all think I'm a super-star now and they are impressed that I had one idea of my own. It reminded me of what a blessing it is to be part of the #MTBoS!