The purpose of this article is to cast a personal glance at the experiences of the last 50 years within Language Awareness and multilingualism. Furthermore it will reflect on the cross-linguistic beginnings (comparing languages) in the 1960s and the beginnings of teaching German as a second Language. In conclusion it will elaborate on the recognition of linguistic diversity, which through the help of concepts of Language Awareness finally became manageable. For this concept to reach the classroom, it had to have practical form and supported through proper teaching materials. Unfortunately even though materials came into existence, their circulation still remains relatively low.