Ключевые слова: academic, assignment, casual, cheerful, children, class, classmate, classroom, clever, cognition, course, data, diligent, education, elementary, ethnic, glad, group, happy, horizontal, indoors, kid, knowledge, learn, lesson, multinational, multiracial, notebook, notepad, positive, prepare, primary, pupil, research, school, schoolchildren, schoolgirl, schoolkid, schoolwork, sit, smart, smile, solve, student, study, table, task, test, together, write,