A teacher who reported an early childhood centre for punishing toddlers by keeping them in isolation or forcing them to sit on a mat for hours fears the abuse is continuing. The woman complained about the Waikato pre-school four years ago, and heard nothing back from the Ministry of Education about the investigation until RNZ made inquiries last week. It says it investigated and found nothing wrong - but the teacher who RNZ has agreed not to name says officials didn't look hard enough and she worries about the children still there. Charlotte Cook reports.