Ciesla, Pawel 5th International Conference research in Didactics of the Sciences - DidSci, Krakow, June 27-29 2012 : Book of Abstracts. -- Krakow : Pedagogical University Krakow, 2012. -- ISBN : 978-83-7271-734-4. Zeslawska, Ewa. Zylewska, Alicja