It is the way of raising the hand most likely in the class.
It is in the chair in the classroom which is entering from the beginning, and both feet are on the horizontal stick in front of the desk.
授業中に一番多いであろう手の上げ方です。
こちらも最初から入っている教室の椅子と机に合わせてあります&机の前の横棒に両足が乗っています。