For those of you approaching the unit on fiscal policy in your class, the standard line is that fiscal policy consists of two tools - taxes and spending.
Do any of you spend time going farther than that? Specifically, when you discuss taxing, do you talk about the sources of tax revenues? I usually mention three - income, wealth and spending. Income taxes are familiar to our students. Even if they don't have jobs themselves, they are familiar with the concept - tax is paid or withheld based on the amount earned. This is frequently where we discuss proportional (same percentage regardless of income) vs. progressive (higher percentage on higher income) taxation.
Students frequently have an idea about wealth taxes, as well. Property taxes of various kinds are examples of wealth taxes. For most cases your students are familiar with, like property taxes, the level is constant and levied on the property involved.
And sales taxes are a good example of consumption taxes that your students are probably familiar with. And depending on how sales taxes are levied in your state and locality, they may offer a lot of opportunities to discuss how taxes affect behavior. For example, when I lived in Illinois, there was a significant difference in the sales tax depending on whether you purchased in Cook County (Chicago) or in the collar counties. It wasn't unusual for people to "shop" downtown and make the purchase out in the 'burbs.
Here is a good article from The Wall Street Journal about value-added taxes (article is subscription only, but plug the headline into your browser - you may find the article elsewhere). Since they are generally considered taxes on consumption, it's often assumed that they are administered like sales taxes. However, because they can be national in nature, there are many considerations that go into what is taxed, what isn't or at what levels. I think you may like it.
Here is a post by Ezra Klein of The Washington Post on the above article.