How to discover asteroid impacts--An Authentic Classroom Approach to Science

Looking for impact craters on earth using Google Earth is a fantastic idea. Found at Astroseti.org : How to discover asteroid impacts, this activity provides students with an authentic look into the work of geologists. I am especially drawn to the idea that findings are published on the internet and then subject to independent verification by a wide audience. Full instructions and some warnings are found at this site. Have a ball hunting impact craters!