My teacher uses a Noise Meter similar to this one. The Noise Meter is a cool way to remind students the correct noise level that they should be using! You just use the paper clip and move it to the appropriate noise level the students should be using.
Watch the The Dark Knight Rises movie trailer. Directed by Christopher Nolan and starring Christian Bale, Anne Hathaway, Liam Neeson and Joseph Gordon-Levitt. The Dark Knight Rises is the epic conclusion to filmmaker Christopher Nolan's Batman trilogy.