PART I: This German exercise calendar covers common vocabulary problems and has been developed over years while working with international students in German classes. The calendar either explains and practices various prefixes of one German verb (lassen: verlassen, hinterlassen, entlassen, nachlassen) or covers different German meanings of one English word that is often misused (to teach = beibringen, unterrichten, lehren). Only the most effective exercises made it to the calendar. It is suited for learners with an intermediate and upper level in German (B1-C1). PART I covers the months January-June.