By the 2nd or 3rd grade, the focus of school primarily becomes that of learning information. To be able to do this effectively, the child must have effectively developed his nervous system and have a brain where both halves are working together efficiently. When the brain is unintegrated, the child is unable to cross his eyes or limbs over the midline, an invisible line down the middle of the body. This negatively affects reading and writing. Likewise, the vestibular system, which is connected to the visual and auditory systems and coordinates visual and auditory perception and processing, must be appropriately developed.
Appropriate integration of the two hemispheres is necessary for everyday school tasks such as reading, writing, mathematics, and general processing and comprehension. Stress can block off access to part of the brain, such as the weaker hemisphere or frontal lobe. This is why it is important to create a low-stress environment for learning.
Those who struggle with directionality, for example, have issues that root in their vestibular system, a balance mechanism that lies in the middle ear, and can be helped with daily movement activities in the classroom (Goddard Blythe, 2009).
In addition to academic difficulties, emotional immaturity is often accompanied by immaturity in the functioning of the nervous system. Examples are poor impulse control and difficulty in reading the body language of others (J). Therefore, it is imperative that the early years, including pre-school through first grade, focus on proving children with rich movement activities that develop a well-developed and integrated brain.
---This is from my book: Movement Makes Math Meaningful: Away from the Desk Math Lessons Aligned with the Common Core
Lisa Ann de Garcia, MA, MEd.