χτίζοντας ομάδες στα σχολεία

http://www.slideshare.net/pappa_anna/ss-57752504?ref=https://pappanna.wordpress.com/2016/02/01/%CF%87%CF%84%CE%AF%CE%B6%CE%BF%CE%BD%CF%84%CE%B1%CF%82-%CE%BF%CE%BC%CE%AC%CE%B4%CE%B5%CF%82-%CF%83%CF%84%CE%BF-%CF%83%CF%87%CE%BF%CE%BB%CE%B5%CE%AF%CE%BF/