Theory Time Grade 6 Workbook by Heather Rathnau. Edited by Heather Rathnau. For General Music Theory. This edition: all instruments. Intermediate level. Workbook. 60 pages. Published by Theory Time (TT.978-1-890348-06-9).
Music theory for a student that has completed Grade Five; focuses on all major keys and 6/8 time (and more!).