(NEWSER) – "Intentional" injuries received at school send some 90,000 kids to the ER each year, a new study shows. There's only been a slight decrease in that figure over the past decade, in what researchers see as a disappointment. "With so much emphasis on school safety and bullying now, we expected a bigger decline," study co-author Siraj Amanullah tells NBC News. Even more worrying: The figure could be misleadingly low. Kids underreport bullying because authorities don't take much action, Amanullah says.