I love this idea as a way to honor strengths and passions while avoiding busy work. I wouldn't get too hung up on accountability, frankly. Trust and opportunities for choice offer rich learning when used well and when used in ways we might not embrace at first. A school with a regular pastoral care program could include progress conversations on passion projects as part of the advisor-student relationship and could easily lean on blog platforms that are freely available for reflection, tracking, and publishing results in multimedia formats. Charles, nicely innovative concept!