"One of the most obvious problems we see from rushed academic training is poor pencil grip. Holding a pencil properly is actually pretty difficult. You need to have the fine motor skills to hold the pencil lightly between the tips of the first two fingers and the thumb, to stabilize it, and to move it both horizontally and vertically using only your fingertips. In a preschool class of 20 we know of in which the kids were encouraged to write much too early, 17 needed occupational therapy to correct the workarounds they’d internalized in order to hold a pencil.
Think of it: 85 percent of kids needed extra help, parents spent extra money, and parents and kids felt stressed because some adult thought, “Hey, wouldn’t it be swell if we taught these 4-year-olds to write?” without any regard to developmental milestones."
Read more in Edutopia - February 15, 2018