Time magazine's cover article notes that Clark's style as principal was primarily disciplinarian in nature, focused on encouraging school pride and good behavior, although Clark was also portrayed as a former social activist in the film Lean on Me. "Clark's use of force may rid the school of unwanted students," commented Boston principal Thomas P. O'Neill Jr., "but he also may be losing kids who might succeed." George McKenna, former principal of Washington Preparatory High School in Los Angeles, often cited as a contemporary of Joe Clark as a school reformer with a similarly outgoing approach, was also critical. "Our role is to rescue and to be responsible," McKenna told Time. "If the students were not poor black children, Joe Clark would not be tolerated."
Other educators defended and praised Clark. "You cannot use a democratic and collaborative style when crisis is rampant and disorder reigns," said Kenneth Tewel, a former principal. "You need an autocrat to bring things under control." Some critics focused on the fact that while Clark had reestablished cleanliness and order, education scores had not substantially improved, which resulted in Eastside High being taken over by the state one year after Clark's departure in 1991. Separate criticism focused on the social impact of expelling delinquent students to improve test scores, claiming that "tossing out the troublesome low achievers" simply moved the problems from the school onto the street. Clark defended the practice, saying teachers should not have to waste their time on students who do not want to learn. However, Time noted that the national dropout rate for such students remained high across the country, with few alternatives available, and that each inner city school that had been able to reverse the trend had done so through "a bold, enduring principal" such as Clark who was "able to maintain or restore order without abandoning the students who are in trouble."