Mature teacher writing down names of frog internal organs on blackboard
Hand of young teacher of geometry drawing triangle with unknown angle
Focus on pensive schoolboy looking at grammar rules on whiteboard
The people at Business Meeting in the conference hall.
Confident coach of military training pointing at whiteboard with tactics plan
Hand of mature teacher of foreign language pointing at document
Watching movie in English at foreign language school
Multiethnic Group of Incarcerated Young Men Attending Classroom Lesson
Happy young teacher pointing at whiteboard while pupil answering question
Young teacher of physics explaining formulas on blackboard
Young smiling female tutor pointing at paper card with Chinese hieroglyph
Teacher reading a lecture for students
Young confident brunette woman making presentation of secret information
Working by blackboard
Inspiring Young Woman Stands Before Knowledge
Confident professor or school teacher looking in open book at lesson
Clever schoolgirl with pen listening to explanation of teacher and making notes
Three young Muslim businessmen sitting in armchairs at seminar or training
Collaborative tech session at university
Three attentive businessmen listening to speaker at seminar
Offering new ideas
Several contemporary brokers raising hands to ask questions of business coach
Cropped shot of confident teacher of music with clipboard standing by whiteboard
Confident teacher of geometry pointing at drawing of triangle on blackboard
Collaborative project planning with teamwork, discussion, and creative ideas
A lecture in progress within a modern science laboratory classroom.
Focus on mature male officer in formalwear standing by interactive screen
Business studies
Cheerful male tutor holding a sign with 'Lesson 2' in a library setting
Clever schoolgirl raising hand while sitting by desk and looking at whiteboard
