In Algebra 2, I loved teaching about compound interest. I didn’t have to try as hard to keep my student’s interest, because we were talking about money! Here is an example for an interactive notebook page. The foldable is by The Math Nerdette. You can find it for FREE on Teachers pay Teachers. Under the left flap, I wrote what each of the variables represents. Under the right flap, I wrote about the different ways things can be compounded. At the bottom of the foldable, I wrote out an example. Since it is blank, you can choose how easy or hard you want the example to be. You could even change the example based on the level of each class period you have. I also wrote the formula for continuous compounding. I teach this formula at the same time, but I notice that students don’t need as much practice with this one. Then, at the bottom of the page, I glued in a typed out example. This can help save time in class. You can download the file for the example here. I like using a comparison problem for an example, because it gives students practice with both formulas. I like to put a question like this on my test :)