250 Grammatikübungen Deutsch als Fremdsprache : für Anfänger und Fortgeschrittene
Alke Hauschild (2014)
250 exercises for post-beginner learners of German grammar seeking practice-based material as opposed to detailed reference notes.
Begins with verbs and tenses and serves as a useful resource for self-assessment and reviews.
In German throughout.
GE GRAM 29 Open access