Rockschool grade 4 builds on the drummer's grasp of various styles (jazz, rock, blues, Latin) and the interpretive skills and flare a drummer needs to possess.  Grade 4 extends knowledge and application of rudiments, technical exercises, two tests (reading, theory, ear tests, improvisation...), from West London Drum Tutor, drum tuition in Harrow, London http://paltip.com/westlondonenglish/!4s8z