To teach someone can be expressed as making one 'know'. Perception of knowledge, its acquisition and so on are various aspects of learning. Since we attempt to make any one including teachers 'know', the librarians can be construed to teach the teachers. The 'instruction' and 'imparting information' functions of the librarian are the key function involved in teaching the teacher.
OF course Librarian can be called as teacher of teachers only when he proves himself worthy for it..A librarian gives effective reference and information services (traditional and webbased) , professional advise, guidance, provides appropriate study material in the form of books and journals /information suiting the curricular needs to teachers ,students and administrative section of all subjects and teaches information literacy for all .Thus s/he plays a very vital role in academic environment..Librarians have also proved themselves successful in providing information services in special and public libraries too..hence s/he can be called teacher of teachers.
I think there is no need to prove that why a librarian is a teacher of teachers.It is already proved,because which prson know from whr a teachr got information for there teaching or 4 odr prps what ever that,then think who is sinor.a librarian have d knolge of al subject in depth.I think he is d prson who instruct d teachrs to find out der information,in dis way he teach to d teachers,thats why he is d teachr of teachrs.This is my prsol point of view.
there is no need to prove is librarian is the teacher of the teacher if librarian do not give the right books right, right information and right source to the teacher he never tought her subject in frount of students in the class. so librarian is the path finder of the teacher thats librarian called teacher of the teacher in the world.