New Jersey’s East Brunswick High School teacher Robert Gangi says when it comes to studying the Holocaust the more you learn, the more you find there is to learn, gmnews.com reports.

Gangi teaches a popular elective class entitled “Genocide and the Modern World” at East Brunswick High School. The class delves into some of examples of genocide in the 20th and 21st centuries including the Armenian Genocide, Darfur, Rwanda and the Holocaust. The class shows that genocide, unfortunately, is not a historic phenomenon or something of the ancient past, he said.

“This is something that is still in our world today,” he said. “You see this over and over again.”