Θετική πολυεθνική μαθητές σε γυαλιά που κρατούν σημειωματάρια και στυλό που απομονώνονται σε μπλε, banner - Φωτογραφίες & Εικόνες Αρχείου

Two kids boy and girl on blackboard background with copy space. Little children students having fun and showing thumb up

Father and daughter at school, teacher and pupil banner. happy father and child study at school with book and laptop on blackboard background, fatherhood.

Young scientists chemists. Children's vocational guidance. Choice of profession. Doctor, laboratory assistant, chemist.

Young scientists chemists. Children's vocational guidance. Choice of profession. Doctor, laboratory assistant, chemist.