TXESS Revolution

I thought it would be a good idea to post the home page from Mike's presentation on Seismic waves.
They have a good program for teachers to receive professional development on Seismographs. In addition, they will send you free posters and reference to materials in both English and Spanish.
Iris website:
http://www.iris.edu/hq/sis
link to workshops: Upcoming Workshop in September Deadline in February
http://www.iris.edu/hq/sis/com/workshops