Always thought this.....
“We found that delaying kindergarten for one year reduced inattention and hyperactivity by 73% for an average child at age 11,” Thomas Dee, one of the co-authors and a Stanford Graduate School of Education professor, said in a release.
Dee did his research with Hans Henrik Sievertsen of the Danish National Centre for Social Research, who told Quartz that the impact was strong and lasted a long time: “We were a bit surprised at how persistent the effect was.” The effect of delaying school on hyperactivity and inattention didn’t diminish over time, as they expected, but increased: in fact, waiting one year virtually eliminated the chance that an average kid at age 11 would have higher-than-normal scores on those measures.