Within linguistics and educational research, language awareness (LA) has been studied for decades. Despite the extensive use of the concept and several conceptualizations, systematic empirical research examining students’ LA across educational levels in the context of plurilingual education is still lacking. The article seeks to fill this gap by introducing a theoretically and empirically based conceptualization of LA across educational levels in the context of plurilingual education and, based on the conceptualization, presents findings from a within- and cross-case analysis exploring students’ expressions of LA in primary, lower, and upper secondary education.