A lot of white men are sitting at a desk in front of the blackboardA lot of white men are sitting at a desk in front of the blackboard
Lecture with formulas on the blackboard in front of studentsLecture with formulas on the blackboard in front of students
A teacher standing at the blackboard with a textbookA teacher standing at the blackboard with a textbook
British pop group on the background of a blackboardBritish pop group on the background of a blackboard
A girl in a black mini with stockings on heels at the blackboard writes with chalkA girl in a black mini with stockings on heels at the blackboard writes with chalk