I wanted to second the encouragement to look for preK and K settings that are based on open-ended play. We chose a nature-based preschool for ds6, who was reading fluently (grade 4+) at 4. He was so busy running, jumping, baking, doing art and creating obstacle courses that he was never bored. He brought home new questions every night to research and the differences between him and age peers in verbal and math skills was never a factor at school.