1. Tsihouridis Ch.1, Vavougios D.* 1, and Ioannidis G. S. 2
    1: Department of Special Education, University of Thessaly, Greece: hatsihour@uth.gr, dvavou@uth.gr .
    2: The Science Laboratory, School of Education, University of Patras, Greece: gsioanni@upatras.gr

  2. Pappas Xristos, Professor of Senior high school of Ano Kalentini, cpappas@cc.uoi.gr
    Kamaratos Matheos, Associate Professor of Department of Physics-University of Ioannina, mkamarat@cc.uoi.gr
    Kotsis konstantinos, Associate Professor of Department of Primaryeducation-University of Ioannina, kkotsis@cc.uoi.gr

  3. P. Mihas and T. Gemousakakis
    School of Education, Alexandroupolis, Gr-68100, GREECE
    E-mail: pmichas@eled.duth.gr
    High School Teacher, working in the School of Education

  4. Dimitrios Kolioulis,1  Constantinos Kampourakis,2 Georgios Tsaparlis1
    1 University of Ioannina, Department of Chemistry gtseper@cc.uoi.gr
    2 Secondary education, 1st Lykeion of Philippias