In Australia, we have AMEB grades to do for many instruments. http://www.ameb.edu.au/practical-exams I've done classical guitar exams before, you had to choose 3 songs to play out of 3 groups (Group A; song 1,2,3. Group B; song 1,2,3 etc). The different groups represented different skills need to play the songs, for example, Group A songs were focused on melody, Group B was the ability to play chordal notes and Group C was focused on more complex rhythms. Then there was a aural test, at the lower levels the questions were what note is higher, what tempo is slower and name the type of chord. Playing a song on an instrument with written music is pretty straight forward, you play the dots. I can't see how if a student was given a syllabus of allowed songs he'd be able to do an exam for DJing. You could make the Exam a total of 10 minutes, showing ability to transition between 3 songs, with maybe other criteria, but that's as far as I can see it going for the mixing side, and the judging will have to be lenient to creative expression and improvisation as one would with Jazz musicians. If the exam was focusing on scratch and beat juggle, i'd say look at what drummers have to do for AMEB. At the high end, you get asked to play any random, if not all of the 40 rudiments at different tempos. I use drum rudiments as a guides for some scratching, Replacing Right & Left with Back & Forward on the wax. http://www.vicfirth.com/education/rudiments.php Not sure if this gave you food for thought or not, I like formal training, but this might not have the appeal for aspiring DJs to learn through such a structure.