<p>According to my knowledge, each part of the brain has a special function without relying on one another.</p><p>The right hemisphere controls the muscles in the left side of the body, and conversely, the left hemisphere controls the muscles in the right part of the body. And people with a more dominant left brain are said to be smart at math, while the right brain excels at creativity.</p><p>So, in my opinion for school-age children who must be trained first is the right brain. Because for the creativity of school-age children more important than others. And I think, if a child already has creativity, other sciences will come alone.</p>