I was really impressed by this video.
She demonstrates great understanding and control and that grounds her lesson. It's specific and very fast but because it's directed at a targeted group of students, Koreans who have trouble with /f/, it works. Also the learner leads because they pause and repeat bits at will, instead of pretending that the teacher is omniscient.
This is another great reason for teachers to run class blogs. Good learners really do find the good resources and if you can start them started you start a virtuous circle for your school and its future learners.
I've been thinking this a lot recently: books are not the best pronunciation resources. Multimedia is the only way to teach this stuff. Build a set of resources you can share with your learners.