Lehrgrammatik; Unterrichtsgrammatik; Pädagogische Grammatik; Didaktische Grammatik; Schulgrammatik; Pedagogic grammar; Grammar (teaching of) ; Mother tongue (teaching of) ; Category (theory of grammar) ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development ; German