Ключевые слова: 1518, activity, adolescents, african, black, blackboard, boys, caucasian, class, classmates, collaborating, college, desks, divided, educational, enjoying, european, exercise, females, friends, girls, group, helping, indoors, information, interest, lesson, males, method, multiethnic, project, pupils, school, skill, split, students, studying, talking, task, technique, teenagers, time, training, university, white, working, young, youth,