Polls that have been taken by kindergarten, first- and second-grade teachers indicate that 30 percent of the kids have been deprived in some way so that they are physically unable to keep up with the class. ↗
They have been deprived nutritionally, or some illness has not been picked up, or they have not been screened for vision or hearing defects, or they have not had some kind of a chronic illness or error of metabolism picked up. ↗
In fact I have a full page warning, right in the front of the book, that no one under the age of eighteen should read this book and no one should even turn the pages if they are sexually conservative or erotically deprived. ↗