The key idea is how IDEA organizes support for students with hearing loss and where teachers of the deaf and hard of hearing fit in. IDEA defines related services as those supports that help a student with a disability access and benefit from education. It lists services like audiology, speech-language pathology, and others, but it does not name every professional by title. Teachers of the deaf and hard of hearing are best understood as related service providers who bring specialized instructional expertise for students with hearing loss. They collaborate closely with educational audiologists to ensure the student can access instruction and participate fully in class. This collaboration often involves making sure amplification and assistive listening devices are functioning in the classroom, adapting communication strategies and materials, supporting language and literacy development, and informing teachers and families about effective practices. They are not the same as general classroom teachers, who typically do not have the specialized training needed to address the unique needs of students with significant hearing loss. And they are not unrelated to educational audiology; their roles overlap in aims—maximizing audibility, access to instruction, and meaningful participation in learning environments. So the best description is that teachers of the deaf and hard of hearing are not named in IDEA by that title, but they function as related service providers whose work overlaps with educational audiology to support students with hearing loss.