This document discusses hearing impairment and hearing aids. It describes how sound travels through the ear and common types of hearing loss such as conductive, sensorineural, and auditory processing disorders. The document outlines different types of hearing aids including Behind-The-Ear (BTE), In-The-Ear (ITE), In-The-Canal (CIC), Receiver-In-The-Canal (RIC), and cochlear implants. It provides accommodations that can help those with hearing impairments in the classroom, such as having the student sit in the best place to hear and using visual aids.