With two volumes, C1/1 and C1/2, the Sicher! series leads to level G1. Each volume includes the Student's Book and the Exercise Book.

The Student's Book exercises students in the four skills: comprehension of written and audio texts, production of written and oral speech, as well as vocabulary and grammar, while also enhancing their visual and auditory abilities through short films.

The Exercise Book contains a plethora of exercises for practice and consolidation of all skills, taking into account the typology of the exercises in the Goethe-Zertifikat C1 and ÖSD Zertifikat C1 (Oberstufe) exams.