Wizard-of-Oz diploma n. I fear that many of the students who pass will go on to earn Wizard-of-Oz diplomas, which signify nothing. Students will claim to be educated, but employers will know otherwise. The phenomenon of the Wizard-of-Oz diploma has discredited the college degree. [EnglishEducationNew or NonceSlang] [full cite] (Jan. 23, 2007)
zero period n. The new schedule has seven 50-minute periods, and extends the school day by 15 minutes. Before, the high school day had six 55-minute periods, but many students took an extra class —- commonly called a “zero period”—before the regular day began. [EnglishEducation] [full cite] (Aug. 26, 2006)