Presents the understandings that all teachers need to play a role in the education of students who struggle: those with disabilities and those who simply lack essential foundational knowledge. This book serves teachers and supervisors by sharing increasingly intensive instructional interventions for struggling students on essential topics aligned with NCTM's Curriculum Focal Points, the new Common Core State Standards for Mathematics, and the practices and processes that overlap the content. These approaches are useful for both overcoming ineffective approaches and implementing preventive approaches. Contents: All means all / Francis (Skip) Fennell -- Learning : a framework / Arthur J. Baroody -- Instruction : yesterday I learned to add, today I forgot / Jeffrey Shih, William R. Speer, and Beatrice C. Babbitt -- Assessment / Herbert P. Ginsburg and Amy Olt Dolan -- Number and operations : organizing your curriculum to develop computational fluency / Edward C. Rathmell and Anthony J.