Ключевые слова: accessibility, at a chalkboard, basic, blackboard, blonde, brick, calculate, chalk, chalk in hand, child, class, cognition, contented, education, elementary, elementary school, exemplary schoolgirl, friendly, front view, girl, happy, he writes on the board mathematics lesson, homework, interior, joyful, learning, learns, lecture, lesson, math problem, mathematics, polite, process, relaxed, school, schoolgirl, shoulderlength hair, smiling, solve, solves a task, stand, stress, student, systematics, task, teaching, test, wisdom, write, young,