First off above is a recent Crash Course video on monetary policy. Secondly here is a great game called "Beat the Fed" which the Wall Street Journal put out. To win the game, you have to guess what parts of the economy have to change and by how much to get them the economy to raise inflation by X% or likewise lower it.
Secondly the Federal Reserve of St. Louis has a number of games on it that you can use with your students.
Finally a little on Twitter. Earlier today Jacob Clifford followed me on Twitter so naturally I went to his feed and looked at some of the people he follows. One of them is Howard High AP Econ which is where I found the "Beat the Fed" game.