These cover the same as Berklee ET2 without copyright issues.
Focusing on the three forms of the minor scale— natural, harmonic, and melodic —along with the "Jazz Melodic Minor" used frequently in contemporary styles.
Starer’s book is public domain in some jurisdictions, and legal PDFs are abundant. This directly mirrors Berklee’s rhythm dictation exercises. Start with Chapter 3 (compound meter) and Chapter 5 (syncopation). This is arguably the for ET-2 rhythm prep.