Tucker Hein is a recent grad from University of Oklahoma. It seems like his heart was broken by Kevin Durant, who left the Oklahoma City Thunder for the Golden State Warriors in the offseason.

So the algebra teacher turned it into a lesson for ninth graders in his new Indianapolis classroom:

Mr. Hein is ready for the first day of school tomorrow. pic.twitter.com/26fZ2X3DfL — Tucker Hein (@thein14) July 31, 2016

Here’s why Hein’s classrom is a “No-K.D. zone,” via News 9 in Oklahoma:

He says he was wanting something to remind his students to work hard, and he came up with the KD bulletin board idea the day before school started. He told me he wondered if people would think it was stupid, and never dreamed it would get so much attention, or he would have made it look nicer. Hein says when his students saw it, they got into a big debate about Durant leaving the Thunder, and that his boss, the school principal, cracked up when he saw it.

Too funny.