She points out that the Common Core math standards are developmentally inappropriate because the writers ignored good brain science and what students are being forced to do in the classroom may actually be harmful to their ability to do more complicated math work if they are not taught certain rote skills early on.
A study conducted by Stanford Medical school examined the role of a part of the brain, the hippocampus, in the development of math skills in children. The authors noted that a shift to memory-based problem solving is a hallmark of children’s cognitive development in arithmetic as well as other domains. They conducted brain scans of children, adolescents and adults and found that hippocampus plays a critical but time limited role in the development of memory-based problem solving skills.
The hippocampus helps the brain encode memories in children that as adults they can later retrieve efficiently when working with more complex math concepts. The hippocampal system works a certain way in children to help develop memory-based problem solving skills. Once the children pass a certain age, the processes change.
The study also found that “repeated problem solving during the early stages of arithmetic skill development in children contributes to memory re-encoding and consolidation.” In other words, rote repetition helps the development of this critical brain system so essential to later more complicated math work.