Even with mild hearing loss on one side, the consequences can be significant in school. 1/3 will repeat at least 1 grade, and up to 40% will need extra educational assistance. One surprising observation in this review was that problems resulted whether or not the one-sided hearing loss was mild or severe. Because the brain uses both ears to figure out where sound is coming from, and to focus hearing over background noise, unilateral hearing loss causes some children to look 'spacey' in the classroom and to be overwhelmed by busy and noisy environments.
School Problems with Unilateral Hearing Loss