An 11-year-old girl has been arrested for allegedly stabbing a teacher at a Queensland primary school. Police tasered the girl at the school at Heatley, in Townsville, just before midday before taking her into custody. Police said they found the student inside the school grounds armed with a knife after responding to reports of a student stabbing a female teacher. Senior sergeant Scot Warrick said the girl received immediate medical attention after she was subdued by officers. “The student was brought…