Soultana Karga graduated from the Department of Informatics of the Aristotle University of Thessaloniki in 2005 and obtained a Master's Degree in Information and Communication Technologies from the same Department in 2007. Since 2006, she has been working as informatics educator in primary schools, in the Public Vocational Training Institutes (IEK) within the Organization of Vocational Training and Education (OEEK) and in the Second Chance Schools within the Institute for Continuing Adult Education (ÉÄÅÊÅ). From 2007 up to date, she belongs to the research and development team of the Parallel and Distributed Processing Laboratory of University of Macedonia. Most specifically, she is working for the Asynchronous Distance Learning service of the Greek School Network (GSN).

Aikaterini Katsana graduated from the Department of Informatics of the Aristotle University of Thessaloniki (2005) and holds a Master's Degree in Informatics (Aristotle University of Thessaloniki, 2007).  From 2006 up to date she works as informatics educator in the all-day primary schools of Central Macedonia, in the Public Vocational Training Institutes (IEK) within the Organization of Vocational Training and Education (OEEK) and in the program “HSIODOS” within the Institute for Continuing Adult Education (IÄEKE). From 2007 she belongs to the research and development team of the Parallel and Distributed Processing Laboratory of University of Macedonia, especially she is a member of Asynchronous Distance Learning team of the Greek School Network (GSN).