The flip side is parents who delay their kids so they are the biggest kids in class and get to dominate at sports. This is also nuts!<p>The right answer is evaluate what&#x27;s right for the child. Different kids have different maturity levels. My daughter started K at age 4 and was still well above average and bored by 5th grade. The productive thing that school districts can do is roll out pre-K so parents don&#x27;t have to make a costly daycare choice.