Aural Training in Practice offers valuable support to teachers preparing students for ABRSM exams. It is available in three volumes covering Grades 1-3, Grades 4 & 5 and Grades 6-8. Each volume includes teaching hints and strategies, many practice exercises for ABRSM exams including answers where appropriate, and CD recordings of all exercises.
Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).