https://www.esos.gr/sites/default/files/articles-legacy/parartima_1tpe.pdf
http://photodentro.edu.gr/
https://www.youtube.com/watch?v=GJhnv4divz8
https://www.hiclipart.com/
https://www.microsoft.com/en-us/makecode
http://users.sch.gr/nikmavr/
http://2epal-trikal.tri.sch.gr/