The lesson in a Houston area high school this morning was two parts chaos, one part explosion.

More than 150 students were evacuated from the Galena Park High School after chemicals exploded in a beaker, reported the Houston Chronicle. No one was injured during the experiment, which was oddly being conducted during a communications class.

“We’re trying to figure out why in a communications applications class students were performing science experiments,” Craig Eichhorn, spokesman for the Galena Park Independent School District, told the paper.

Campus and district administrators were interviewing students and teachers from the class to determine how the accident occurred. The school district has a Twitter account designed to be used to communicate news, announcements, and emergency notifications. The account had no mention of the incident, however.

Students typically learn how to express ideas in the communications class, sometimes using visual examples or talking about life experiences, Eichhorn said.

“We’re going to get to the bottom of it and find out how it happened,” he said.

For more information, see the full story at the Houston Chronicle.