Tomorrow is the deadline to file income taxes in the United States. If you have high school students, some of them may be filing taxes (or having parents do it on their behalf) for the first time. That may lead to all kinds of questions about why we have taxes, the way taxes are calculated, and types of taxes. Crash Course has a twelve and a half minute video in which those questions are addressed.

PBS Learning Media has a free lesson plan through which students learn about reasons for taxes being withheld from paychecks, where the withholdings go, and why some people have more or less withheld than others. In addition to helping students understand taxes withheld from paychecks Taxes – Where Does Your Money Go? introduces students to concepts related to saving for retirements. To that end, the lesson plan includes a video about how a self-employed person handles budgeting for taxes and retirement.

To explain the origins of income taxes in the United States, CBS News hosted author Kenneth Davis. Davis is the author of the popular “Don’t Know Much” series of history books.