A good place to start. This site provides epicenter maps with a yellow background which show earthquakes in the U.S. and World for the past two weeks. A long listing of recent earthquake data follows. Earthquake maps are updated every 6 hours. White outline maps of the continental U.S., Alaska, Hawaii, world, and selected regions.
Colored dots show depths, and sizes of dots show magnitude.
Lists of earthquake data are also presented, particularly for the Central U.S. from the New Madrid Seismic Network. A map of world earthquakes of 1996 can easily be used in a classroom to plot epicenters onto an inexpensive wall map. Colored adhesive dots of several sizes, can be used to represent earthquake magnitude and depth. Students could update the wall map weekly. This interesting site is in France, and provides current seismograms, as well as data from the last ten large recent events worldwide.