This is a slight deviation from our core purpose of supporting French learners, but here is some support for those learning music theory with the ABRSM.
Most grade 5 theory terms on quizlet
Grade 5 Scales
Grade 6 Scales
About the Baroque period (JS Bach, Corelli, Handel, Purcell, Rameau, D Scarlatti, Telemann, Vivaldi)
About the Classical period (Haydn, Mozard, Beethoven, Schubert)
About the Romantic period (Chopin, Schumann, Liszt, Brahms, Tchaikovsky)
About the Twentieth Century (Stravinsky, Schönberg, Bartók, Prokoviev)