Ключевые слова: achievement, achieving, action, active, activity, assign, assignment, background, class, classwork, collaborate, collaboration, complete, cooperate, cooperating, cooperation, cooperative, finish, goal, group, heavy, homework, images, job, learn, learning, lift, lifting, load, mission, objective, people, project, pull, pulling, royalty free photo, school, several, stock image, stock photograph, stock photographs, stock photos, strong, stronger, students, succeed, success, successful, task, team, teamwork, together, tug, tugging, workers, working,