From a teacher’s point of view, a child’s academic mistakes are worth their weight in gold. I really, really wish they wouldn’t be punished. Corrected, yes; punished, no. If a child is punished for making mistakes on a sheet of paper, either through bad grades, scolding or just simple disapproval (and coming from a respected adult, there is nothing simple about that disapproval), the child is going to go to great lengths to avoid punishment. It is human nature.