I am a math major with a biology minor. Here are some lesson plans that I found that could be very useful for a math classroom. I've learned it this way and never forgotten it. Contains a game to show how probability works. Many graphing concepts are involved.
Students learn how to follow stocks and what the abbreviations mean.
Great real world example. Introduces students to fundamentals of statistics and the vocabulary it involves. Very basic lesson plan and would be most useful for middle school age students. Here are some interesting sites that deal with math and are great for either your students or yourself. Gives written examples and graphed examples.