METZGER, Susanne. Natural sciences in secondary education : A look at the canton of Zürich and at Switzerland. Swiss Journal of Educational Research, Bern, v. 32, n. 3, p. 421–444, 2010. DOI: 10.24452/sjer.32.3.4842. Disponível em: https://sjer.ch/article/view/4842. Acesso em: 22 feb. 2025.