On Channel A's 'Teachers 3: Retake War,' the math class led by Jeong Seung-je underwent an intensive boot camp training that was revealed on the show. Participants were pushed to their psychological and physical limits, continuing their training under extreme pressure.

[24-Hour Close Guidance... "If You're Overwhelmed, How Can You Swallow Your Food?"]

Jeong Seung-je provided the five math class members with dedicated study spaces and lodging facilities while conducting 24-hour close guidance. Even during mission execution, he maintained a strict stance toward the students. When one participant said the mission was overwhelming, he rebuked them, saying, "If you're overwhelmed, how can you swallow your food?"

He said, "Usually when you're overwhelmed, you can't eat. When you're overwhelmed, you need to think about how to overcome it," emphasizing that he could not continue with students who failed to fix their lazy habits. He also explained, "Breaking habits isn't easy, so I wanted to check every day and correct any lazy attitudes."

[Spartan-Style Training to Restructure Thinking Frameworks]

The broadcast featured Spartan-style training aimed at restructuring the participants' thinking frameworks. Jeong Seung-je said, "You have to establish a systematic way of thinking. If you do it the wrong way, no amount of time will help. Once you set the right direction, you can follow through."

[Jeon Hyun-moo: "Never Seen Training Like This"... Jang Young-ran: "I Can't Breathe"]

Watching this, Jeon Hyun-moo recalled his own school days, remarking, "I've never seen training like that in my life. He's really grinding those kids down." Jang Young-ran complained of difficulty breathing, saying, "I can't breathe. It's really brutal."

[Tears and Vomiting... The Participants' Limits]

During the rigorous training process, participants experienced psychological and physical limits. The 'Slaying the SNU Sister' contestant shed tears, saying, "It feels like I'm the only one falling behind while everyone else is working hard," and called her parents to express her wish to leave the program midway. The 'No Private Tutoring, First in School' contestant even vomited and collapsed due to physical exhaustion.

Jeon Hyun-moo urged the retake students to wake up, saying, "You came here in place of other students' opportunities, so you must approach this with a sense of responsibility."

Jeong Seung-je's harsh training and the participants' reactions can be seen on Channel A's 'Teachers 3: Retake War.'