Chris Allens hugely successful Progressive Studies for Clarinet share the same aims as these: to provide students with instructive material written in a modern style to supplement existing, though more traditional pieces. Thirty studies, ranging through grades 1 - 6.BASSOON STUDIES Currently on exam syllabus: Bassoon AB: 1 - 2, 4. Pieces in book are approximately Grade: 1 - 6 standard.