Nauczyciel przygotowujący się do egzaminów. Profesor trzyma książkę i wskazuje. Nauczyciel w koledżu na wykładzie uniwersyteckim - Zdjęcie stockowe & obraz

Teacher preparing for university exams. Professor holding a book and pointing. Teacher in college on university lecture

Cheerful funny academic professor in the library, knowledge, learning and education concept. Think senior teacher

Teacher preparing for university exams. Professor holding a book and pointing. Teacher in college on university lecture

Serious professor. People scientist occupation, knowledge, learning and education concept

Teacher in the classroom near the blackboard is teaching a lesson. Professor at the university is giving a lecture

Cheerful funny academic professor in the library, knowledge, learning and education concept. Think senior teacher

Older male thinking teacher standing in front of a chalkboard in a classroom. Think senior. Teachers job and learning concept

Academic success. Mature elegant professor with glasses. School thinking teacher or college and university lecture

Medicine pill from headache migraine. Tired man having a terrible headache. Exhausted man feeling unhealthy, upset about headache illness. Stressed middle-aged man having headache. Migraine concept

Young handsome bearded man scientist or professor with long beard and teacher glasses with book or notepaper sitting at table with wooden cubes isolated on white background

Portrait of serious teacher in school classroom. Tutor, professor, mentor man at desk. Studying, learning, training concept

Academic success is much more about hard work than inborn talent. High school concept copy space. World teachers day. Bearded professor at school lesson at desks in classroom

Business school of education concept. Businessman motivation. Coworker working at office workplace. Businessmen using laptop at work.

Man with beard and mustache on serious face. Bearded man in casual suit in office. Confident businessman at working place. Business and office lifestyle. Confidence and success concept.

Teachers day. Teacher tutor in school classroom. Knowledge, education. Man with book teaching lesson in class. University exam. Study teach in college. Educator learning courses. Studying literature

Disagreements in business. Man with beard on hopeful face holds mug, bosses, coworkers, colleagues on background. Business negotiations concept. Man hope for success, waiting while partners discuss