Grade Two: Math
Also, the NBT standard requires that students explain why addition and subtraction strategies work using place value and properties of operations. Explanations can be supported by drawings and objects. This is an important skill for your child as students are expected to provide explanations for their answers in the classroom and on tests. We are working in second grade to set the foundation for your child to have the skills necessary to provide written explanations in third grade and beyond.
Then, we moved from using the physical disks to having students draw the place value disks. It is important that students make precise drawings. They should draw in horizontal arrays of 5. This visual reference enables students to clearly see the composition of the ten.
While some students may already know the algorithm for adding bigger numbers including regrouping, the process of connecting their understanding to the concrete and pictorial representations develops meaning and understanding of why the process works, not