The paper presented above (posted here with the author's permission) documents all the hard work that students put into measuring indicated quantities. To me, that paper has a lot more value than a nice copy of the results. It shows all the struggles, trials, errors, and victories on the way to understand the nature of sound phenomena.
The challenge associated with this approach to learning is that the students must go through some confusion at first to finally come to better clarification. If accepted, that challenge leads to knowledge based on experience - way above the knowledge from a textbook or a lecture.
