Just as a contrary (edit: or perhaps corroborative, depending on what we are attempting to show) data point, I was put in at 4 and was just fine, even in honors&#x2F;advanced classes (not boasting, as if I could, just adding that circumstance).<p>Worth noting that my family, despite my parents breaking up around that time, was very supportive and, if not well off, at least not struggling financially. I went to public school K-12.<p>Seems things work both ways, but possibly the risks are greater in going in early than late — but, as usual, the outcome depends far more on other circumstances.