Solving for Why offers educators the tools and guidance essential for successfully solving for why students struggle with mathematics. The step-by-step, RTI (Response to Intervention) - like approaches, focused on assessment and communication with students, help teachers gain insight into student understanding in a remarkably different way that recipe-type approaches that assume the same solution applies to learners with similar struggles. With Solving for Why you'll learn how to: identify a struggling math learner, develop theories for why a learner may be struggling, facilitate a Concrete-Representational-Abstract (CRA) Assessment, implement an insightful Collaborative Study, conduct powerful student interviews, support learners who struggle with memory challenges, attention deficit disorder, and affective difficulties (math anxiety), differentiate instruction through a main lesson-menu lesson plan, and more. Each chapter includes reproducible templates for ease in carrying out the assessments. A final section offers resources for supporting students who struggle with additive reasoning, multiplicative reasoning, fractions, and proportional reasoning. The reproducibles are also available in a downloadable, printable format.