Language testing ; Language teaching ; Schrifterwerb (gesteuerter) ; Schriftspracherwerb (gesteuerter) ; Alphabetisierungsunterricht; Literacy (teaching of) ; Written language instruction ; Lehrplan; Instructional advice ; Case study (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 ; Functions of language; Language function ; Aetiology; Anamnese; Diffentialdiagnose; Differential diagnosis; Symptom; Syndrome; Prognosis (pathol.) ; Biomarker; Diagnosis ; Language intervention; Children (speech therapy with) ; Speech therapy for children ; English