Children have the genetically ingrained capacity to induct the grammar of their native language. Thus does a child born in Germany naturally learn to speak German and a child born in Italy naturally learn to speak Italian. This has been known by psychologists for many years. Similarly, the brain has the ingrained capacity to induct the nature of reading, but only if the child is first read to and then with by a parent when they are a toddler. Given this interaction, most children will be reading simple books by the time they begin kindergarten. While the public education system is generally poor at teaching children with difficulties, attempting to paper-over their inadequacies with trumpeted pronouncements, teachers cannot be expected to take the place of children who have failed to receive the "good-enough" parenting that is the birthright of all children. Thus many children are unable to read and unready to learn, or even cognizant of basic courtesy as teachers complain. Nuff said.
A Psychologist's Thoughts on Clinical Practice, Behavior, and Life
Children and Reading
Why Many Children Can't Read
That many children can't read shouldn't be happening since this ability is innate and learning it presents no greater difficulty than learning to eat with a spoon. Why it does is the unacknowledged "Elephant in the Room," and not the fault of teachers but of parents.
A child naturally learns the language of their country of birth. Thus one born in the U.S.A. learns English and one born in Germany learns German and the same for other countries. They accomplish this not by memorizing all combinations of words which is impossible, but by inducting the grammatical structure of their language, a task for which the human brain is genetically programmed at birth.
Thus if parents first read to and then with their toddler beginning at two years of age, aiding the reading learning process by moving their finger along the printed line, their child will read simple books upon beginning kindergarten. Not all children but nearly all, provided that they are experiencing a "good-enough" parenting since its lack can create psychological difficulties affecting learning.