Did you read the articles or the police report? She was mixing chemicals in a plastic bottle in the schoolyard near a gazebo. She was not in a science classroom, the science staff didn't know she was doing it. Her statement to the police was that a friend told her to do it, and she didn't know what the reaction would be! This wasn't a science experiment, it was a kid screwing around and doing something stupid; that is, she built and detonated a small explosive device at a school. What if she'd screwed up and caused a big explosion? I have to agree with GP; ggp is an idiot.