Is our child ready to enter school?

Is our child ready to enter school? This question is asked every year by a large number of parents when the enrolment in the first classes of primary schools is approaching, and often also by those who have not yet doubted and were sure of their child's maturity. Will my child succeed? Won't he be in trouble? Will he be good at learning? Will he make friends at school? How will he or she handle the demands of school on attention, ability to concentrate, learn, submit to the teacher's authority, and cooperate with other children?