May 2016 Book of the Month. Stotsky has recently devoted her time to warning about the academic weakness of Common Core. She helped create Massachusetts English and Math standards, which were excellent before the state fell prey to Common Core. If states move forward with evidence-based reforms in teacher preparation, then failed Common Core student standards would have less impact. Well-trained teachers imparting subject matter over which they have mastery could have a greater impact on students than standards.Teachers cannot teach what they do not know. This country has tolerated a weak licensing system for prospective teachers for decades. This weak system has been accompanied by an increasingly emptier curriculum for most students, depriving them of the knowledge and skills needed for self-government.An Empty Curriculum: How Teacher Licensure Tests Lead to Empty Student Minds makes the case that the complete revision of the licensing system for prospective and veteran teachers in Massachusetts in 2000 and the construction of new or more demanding teacher licensing tests contributed significantly to the Massachusetts education miracle. That miracle consisted of enduring gains in achievement for students in all demographic groups and in all regional vocational/technical high schools since 2005gains confirmed by tests independent of Massachusetts policy makers.Teachers cannot teach what they do not know. This country has tolerated a weak licensing system for prospective teachers for decades. This weak system has been accompanied by an increasingly emptier curriculum for most students, depriving them of the knowledge and skills needed for self-government.An Empty Curriculum: How Teacher Licensure Tests Lead to Empty Student Minds makes the case that the complete revision of the licensing system for prospective and veteran teachers in Massachusetts in 2000 and the construction of new or more demanding teacher licensing tests contributed significantly to the MaslCİ