Better teachers for kindergarten safety

ON MARCH 27, 23 kids at a private kindergarten in Jiaozuo, Central China's Henan province, suffered from food poisoning. According to the results of the police investigation, the cause was a teacher who put sodium nitrite, a kind of toxic chemical, into the porridge provided by the kindergarten because of a dispute with another teacher. Gmw.cn comments:

Sodium nitrite is highly toxic, and the maximum intake a human body can sustain is 0.3 grams at a time. The suspect has already been detained by the police and may face criminal charges, and the kindergarten involved has had its business suspended and its pupils are attending other kindergartens nearby. However, these are only temporary measures.

The incident should sound an alarm about kindergarten security. Some kindergartens have installed cameras to monitor the daily activities in the classrooms, but these cameras cannot help all the time. Sometimes they provide evidence after bad things happen, but they cannot always prevent them happening. That the teacher took the children as a target for revenge indicates that there is a big problem with the teacher.