German textbooks of English influence their users’ acquisition of agreement patterns with collective nouns in two ways. On the one hand, the use of collective nouns throughout the textbooks serves as a language model for students, and on the other hand, their grammar sections provide explicit rules on agreement patterns with collective nouns. The present study analyzes both these aspects in the LehrplanPLUS versions of the textbook series Green Line and Access for Bavarian secondary schools (Gymnasien) and compares them to native speaker data from Levin (2001). Although this comparison shows that the agreement patterns with collective nouns throughout the textbooks support their nativelike acquisition, the grammar sections show some deficits that might inhibit the nativelike acquisition of agreement patterns with collective nouns.