Abstract. As research shows that the knowledge and use of models and modelling by teachers is limited, particularly for predicting phenomena, we developed and applied a sequence of three representations of a simulated model focusing on polarization and specifically showing the behaviour of an atom, and forces exerted on a dipole and an insulator, when a charged particle is placed anywhere near them. The sequence was tested with beginning student teachers. They worked with specially developed worksheets in which the simulated model was treated, before carrying out hands-on experiments embedded in a model-based instructional unit which aimed to help the student teachers understand polarization and become familiar with the predictive use of models. Selected pre-study tests, post-study tests and group interview results are presented, showing the participants' ability to use the model to predict the attraction between an uncharged and a charged balloon.

Print publication: Issue 6 (November 2009)
Received 26 March 2009, in final form 21 June 2009