开放教学与学术演示资源，共 18 页。原作者：Esther Maes; Esther Plomp; Marta Teperek; Renate Ellens; Richard Adams; Rob Day; Susan Branchett; Wouter de Jong; Yasemin Turkyilmaz-van der Velden。保留原文件语言与内容。
资源署名：Esther Maes; Esther Plomp; Marta Teperek; Renate Ellens; Richard Adams; Rob Day; Susan Branchett; Wouter de Jong; Yasemin Turkyilmaz-van der Velden · cc-by-4.0 · 原始来源
