Why not have the field trips, sports exchanges, gateway, work experience all put on the one day with individual projects based around the New Zealand Curriculum 2007 happening on that day. How often are music and art students out of class working on their portfolios. Technology as well as Digital Technologies also need this time.
Now this isn't looking at happening for the entire school. Junior classes, Year 9 & 10 still need to happen. But senior classes could be a start.
Interesting idea. I wonder how I could use this to link in with the creative city.