DMCA Exemptions, education edition

Passing this on from Patricia Aufderheide, who writes:

Teachers and students have many situations where they might want to access unlicensed copyrighted materials, employing their fair use rights. (Does your assignment permit critiquing media? Might a student who is preparing a paper for digital posting want to quote from an e-version of a book? Are you incorporating copyrighted material into a slideshow for a workshop or conference lecture? etc.)
...
We are looking for two kinds of evidence:
1) Are you able to use [the existing] exemption--to break encryption on DVDs to teach/research better--now? If so, how do you use it? (Renewal is not guaranteed; if it turns out nobody cares, well then maybe it's not necessary, the Office could reasonably argue).
2) Are there any situations in which you find yourself thwarted from teaching or researching because you can't legally break encryption on some piece of media, or now that you think of it you might like to expand your practice to be able to do something with encrypted media that you've "taken off the table" because you "knew" you couldn't get at it legally?

Examples have proved highly persuasive to the Copyright Office in the past; please consider contributing any you have. Further information is available at Patricia's earlier blog post on the educational exemptions.