Прочла.Как и предполагала, контрольной группы нет. Как и хоть какого-то сегментирования.При этом: However, at the same time, it is recommended not to prohibit the use of technological devices in the educational centre, since this fact encourages students to use them secretly and increases their desire to use them. To this end, its use in the classroom is advocated from an educational perspective, thus promoting collaborative learning and increasing student motivation.