The teaching series Sicher! is aimed at students aged 15 and covers levels B1, B2, and C1 in 3 volumes. The topics of the series revolve around everyday life, work, studies, and professional training. Each chapter has a clear structure and consists of the following parts: reading comprehension, listening comprehension, written production, oral production, vocabulary, grammar, and a visual-auditory unit. A variety of exercises for repetition and consolidation of the material create the ideal basis for teaching at levels B1, B2, and C1. The teaching series is accompanied by rich visual-auditory material.