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Young business man writing a business graph.
The professor writing on the white board.
adult bald man with white beard holding blank sign with copy space isolated on white background
A side view of one young male professor giving a lecture about ecology and saving the planet Earth and drawing on a board.
Mature teacher writing down names of frog internal organs on blackboard while explaining students of high school subject of lesson
Businessman lecturing
Happy smiling instructor showing something at the blackboard in a classroom
different personalities discussing inside a man
father and daughter picking out the best book of her choice from bookshelf. Choosing the best seller book from the bookstore.
Young bearded serious handsome man in casual clothes posing isolated on white background and pointing finger down
View from behind Middle Eastern businesspeople in traditional and western attire sitting in audience, facing projection screen, and listening to communication.
Schoolboy showing a smartphone to a male teacher isolated on white background
Side view of customer trying on some glasses in optical store
Man pointing finger away paying your attention
Senior teach standing with a serious expression and hand in pocket holding chalk pointing to a blank chalkboard in a classroom
Smiling of businessman writing on whiteboard during business meeting in office.
Father helping with new project stock
Portrait of a young professor teaching about AI
A gray-haired famous professor in a jacket and jeans shows his way of solving the theorem at a training seminar for teachers.
Judges handshaking with a contestant in a music contest
Medium shot of a middle-aged man pointing right then giving thumbs up to the camera
Happy smiling instructor showing something at the blackboard in a classroom
Maths lesson. A school teacher explaining new topic at maths lesson
Young bearded smiling handsome man in casual clothes posing isolated on white background and giving thumbs-up
Professional senior businessman leader meeting with co-worker team talking, listening, brainstorming, planing project and preparing in conference room, Business employees staff in meeting room
Middle aged caucasian rocket scientist department of rocket science
A shot of one young male professor giving a lecture about ecology and saving the planet Earth and drawing on a board.
Full length profile shot of a bearded male teacher giving a book to a boy isolated on white background
Teacher talking in the classroom or seminar
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