I've never had any trouble bringing things in to my geometry, trig, or calculus courses. I think it's very important to do so that students have something that sticks out to them years later. Unfortunately, my problem is that I can't seem to think of anything for algebra. Sure I can talk to my classes about functions that model real world situations, but I can't actually bring in a rocket that's modeled by a certain function, or a car traveling at a certain rate, etc.
So I'm looking for ideas or things that you bring in to show your algebra classes. Thanks.
I'm motivated by these videos and this professor. https://www.youtube.com/watch?v=97oTDANuZco