1. Fifth High School of Veria, Veria, GREECE
2. Computational Methodologies and Operations Research Laboratory, Department of Applied Informatics, University of Macedonia, Thessaloniki GR-54636, GREECE
3. Christian Pedagogy School of Social Theology & Christian Culture A.U.Th. GR-54124, Thessaloniki, GREECE
4. Educational Consultant Directorate of Secondary Education of West Thessaloniki, Thessaloniki, GREECE