“Office hours are some of my favorite hours of the week,” says professor Tom Carlson, a medical doctor, ethnobotanist, and instructor of 1700 students annually at the University of California, Berkeley. One of Carlson’s former students, SciFri associate senior producer Christopher Intagliata, says Carlson’s class got him on the path toward science. In this “Teacher Feature,” Intagliata tells his former teacher what the class meant to him.