Teacher near the blackboard with chalk. Business conference, presentation. Lecture at the university, training. Lecturer lesson. Courses of knowledge. Silhouette Vector Illustration premium vector by Irusetka.yandex.ru

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group vector business person people board male man silhouette office school job seminar conference Presentation learning education studying intelligence speaker leader pointer study University team workshop lesson leadership training crowd knowledge audience showing meeting master teacher professor blackboard classroom chalk students lecture near schooling brainstorming coach lecturer instructor courses tuition

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