Pertaining to the personal and professional development of comenius assistants, it is secure to speak of the impact of the Erasmus+ Comenius Assistantship Programme concerned as follows: Professional and personal development: Comenius Assistantship proved to be of highly effective programme, a project thoroughly designed to foster the personal and professional development of prospective teachers. Almost all Comenius Assistants confirmed the value of the teaching period abroad on their maturity: the younger the assistants, the higher their benefits.