Common Core Secondary Math brings you “RTI Intervention Fluent in Math: Fluency Checks for the Common Core” The Common Core State Standards in Math (CCSSM) stress fluency with skills and procedures along with conceptual understanding and mathematical applications.We all have the students who leave elementary school and cannot work with fractions. While some need intensive support, others simply need to have someone take the time to explain fractions and their operations. To determine if the s