Pressure Cooker highlights two semesters in the culinary arts class of Wilma Stephenson, an irreverent high school teacher in Northeast Philadelphia whose no-holds-barred teaching style helps her students earn scholarships to college. Mrs. Stephenson spells it out on the first day of school by telling the newcomers that 11 members of last year’s class earned over three quarters of a million dollars in scholarships, a staggering amount.