Constance Robertson told police she believed the 16-year-old male student was actually 18.
"I'm sick of her," Roosevelt High School principal Aqueelha James said. "I'm going to have a long, drawn-out email just so that I can embarrass her."
Scientists identified the body of An Vinh Nguyen on June 27.
China's Party Committee Propaganda Department said Wang Dong's social media posts were "extremely erroneous" and an "extremely bad influence."
"I should have let you known earlier, and for that I apologize. But for reasons of these politics, I must rescind my offer to write your letter."
A second teenager was also shot a mile away from the school on Wednesday.
A California high school senior was arrested Monday on battery charges after allegedly stealing a classmate's "hateful" Make America Great Again hat.
The former music teacher denied all charges during his arraignment Thursday.
The 20-year-old went missing in Brooklyn, Iowa, almost a month ago.
"The student was promptly returned to class and the school administration contacted the family to apologize."
Tens of thousands protested the country's road safety standards for more than a week.
"I did nothing wrong, I wasn't making any noise or bothering anyone. All I did was be black."
Tibbetts went missing from her hometown of Brooklyn, Iowa, in mid-July while she was dog-sitting for her boyfriend's brother.
Mollie Tibbetts went missing in mid-July.
Education Secretary Betsy DeVos has rolled back protections for transgender students.
"Aw, don't be ashamed now. 'Cause you weren't ashamed during the school year. We need to put this on your Snap[chat] so all your friends can see."
The head of Russia's security council blamed a wide range of groups for implanting "destructive views" in the minds of the youth.
The Justice Seekers Student Movement said the "illegal" building must be destroyed.