The decapitated body of Malim Abdul Habib was found in his home in Qalat on Wednesday, said Ali Khail, a local government spokesman....
Habib was a teacher at Shaikh Mathi Baba School, which is attended by both sexes.
Zabul province's education director Nabi Khushal blamed the Taliban for the killing.
"Only the Taliban are against girls being educated," he said....
He said 100 of the province's 170 registered schools were closed, mostly in outlying districts, because of poor security.
Of the 35,000 students attending schools in Zabul, only 2,700 were girls, he said.
There has been a spate of attacks on girls schools and teachers across Afghanistan since United States-led forces ousted the Taliban in 2001.