By 2050, nearly 2.5 billion people will have some level of hearing loss, with childhood conditions like otitis media continuing to create preventable health and learning barriers. This cluster gives teachers, caregivers, and learners essential hearing-health knowledge, from basic ear anatomy and common pediatric ear diseases to the educational impacts of untreated hearing problems. It also underscores the key role schools play in early detection. The cluster outlines practical classroom strategies: improving acoustics, reducing noise, using sound-field systems, spotting early signs of hearing loss, supporting communication, and understanding disorders such as Auditory Processing Disorder. It offers clear, evidence-based guidance grounded in WHO recommendations and clinical research.