The move to Common Core State Math Standards represents two significant transitions for teachers and students. First, the new standards identify rigorous mathematics content that often exceeds previous expectations. Second, the vision for the Common Core encompasses a series of Mathematical Practices that include skills, processes, and attitudes that can only be developed through extensive experience with skillfully facilitated problem solving and effective discourse. To facilitate these TRANSITIONS, Walch Education has developed this collection of problem-solving tasks that target the new content and embody the new practices. These 15 tasks will help you to infuse existing curriculum with both the content and the practices of the Common Core and support problem-based teaching and learning. Each task takes only 20â?“30 minutes for students to complete with another 10â?“20 minute debrief to enhance reasoning and communication, and to crystallize understanding. For the teacher: For the students: