Celebrity chef Jamie Oliver may not be starting a "food revolution" with his push to make school lunches healthier, but Marion Nestle gives him credit for trying to get "real food" back into cafeterias. The challenges to his include "USDA rules that make cooking too expensive for school budgets, entrenched negative attitudes, widespread cluelessness about dietary principles," and students' fast-food habits. Oliver has tried to address these barriers in "exactly the right way" by involving principals, teachers and parents in the process.