Environmental chemicals in new construction, cleaning compounds, paints and floor wax in older schools and out-gassing formaldehyde, hydrocarbon and chlorine fumes from new, and mold from older books, are responsible for attention deficit. Read the footnotes in Beating Alzheimer's. Teachers, open a brand new book and push it into the face of a student with attention deficit disorder and observe their behavior. Do not be surprised if they cannot keep their eyes open. Air out their books for two weeks and notice the improvement in their attention span and behavior.
Writing is a cerebral-motor function.
Their writing will become heavy and illegible. Check the clinical signs for chronic low level mercurial poisoning and if possible, their nutrition. Read the Impossible Child by Dr. Doris Rapp. NutraSweet, during the metabolizing process, turns into alcohol, before it becomes formaldehyde.