Common Core Revealed The absolute BEST study guide booklet for 7th grade Common Core math you can buy Period. 35 pages of stripped-down, right to the point, step-by-step explanations. This material is teacher-created with insider tips and tricks that only a middle school math teacher would know. Many examples are provided with every section and sub-section of the Common Core. Out Smart your teacher with advanced math knowledge, Get a serious leg up & help with this step-by-step Quick Reference Guide for 7th grade math.