Place value concepts as presented in German and Australian student workbooks. - Larkin, Kevin; Ladel, Silke; Kortenkamp, Ulrich; Graven, Mellony; Westaway, Lise; Vale, Pamela; Fry, Kym; Booysen, Tammy; Wiedenhöfer, Dinah-Marie (Congress of the European Society for Research in Mathematics Education, 2026)