This empirical study investigates the main features of curricula and contexts that favor or hinder the process of transfer of a teaching-learning sequence (TLS) from the designers' original situation to a host one. The specific research questions addressed were (RQ1) what were the changes made during the process of transfer in the new context?…

Discusses the use of formulae in the teaching of chemistry as part of the individual culture and of the conceptual structure of chemistry. A historical viewpoint on the procedures for structure representation and some educational implications for teaching chemistry in Italy are also presented. (HM)