Do your students have the incorrect idea that addition omakes numbers biggero and subtraction omakes numbers smallero? Do they believe that subtraction is always otaking awayo? What tasks can you offer - what questions can you ask - to determine what your students know or donAEt know - and move them forward in their thinking? This book focuses on the specialized pedagogical content knowledge that you need to teach addition and subtraction effectively in prekindergartenugrade 2. The authors demonstrate how to use this multifaceted knowledge to address the big ideas and essential understandings...