This set includes 5 days of problem of the day "Problem Exploration & PARCC Practice Prep" for Adding and Subtracting within 20 using mental strategies. The very child-friendly sheets challenge students to make sense of problems with what they already know, before then collaborating with peers and discussing together as a class. I included mostly open-ended questions for this part, and then questions scaled down from the PARCC 3rd grade practice test for the bottom part. There are 2 problems a day for 5 days of school. I will be using each over a 2-day period myself to really spend time letting the kids talk and make sense of these foundations.