I left the classroom in 2010, but every year it seems I get at least one request for more information about an activity that I did back then. Full disclosure, I got this activity from a colleauge, Dave Cruz, who taught 7th grade with me at Snoqualmie Middle School. Isn't that what we do as teachers, take the best of what we see from others ? Anyway, I think what happens is that teachers are searching for activities related to the Geology of Washington and they come across this video that I put on YouTube in 2009:
It seems that teachers have a desire to try this activity but don't have all of the materials. Well, in an effort to make these materials more available, here they are!
You can view them embedded below or click here to download.