Rather than constituting a problem for students and educators, the growing diversity in U.S. classrooms necessitates and encourages the development and use of diverse teaching strategies designed to respond to each student as an individual.
Damage to a discrete part of a the brain in the left frontal lobe (Brocaâs area) of the language-dominant hemisphere has been shown to significantly affect use of spontaneous speech and motor speech control. Words may be uttered very slowly and poorly articulated.
The left posteroinferior frontal cortex (sometimes called the Broca area or posteroinferior prefrontal areaâsee Figure: Areas of the brain. ) controls expressive language function. Lesions in this area cause expressive aphasia (impaired expression of wordsâsee Aphasia).