Using PBL in Multiple Classrooms

Recently we were charged with the task of developing a PBL activity using Science, Music, and Language Arts and another PBL activity using Math, Social Studies, and Visual Arts.  For this activity, we also had to clearly align our content with standards from each of these areas.  This proved to be an interesting challenge.  The hardest thing to do during this activity was to come up with a topic that could be used in each subject area.  Many musical concepts can be tied to science and many can be tied to language arts, but how many can be tied between all three of them at once.  Once I found a topic I was comfortable with, I had to find activities to accompany each subject area.  This part of the task was also a good experience because I had to think in a very different way than I normally do.  Overall, I enjoyed completing this because not only did I learn from my own ideas, I learned from reading the ideas that my classmates came up with.  There were many great ideas included in this discussion.  It makes me think, how many of us already do activities that teach across the curriculm in our own classes or by collaborating with others?