Deaf education is the education of students with any degree of hearing loss or deafness. This may involve, but does not always, individually-planned, systematically-monitored teaching methods, adaptive materials, accessible settings, and other interventions designed to help students achieve a higher level of self-sufficiency and success in the school and community than they would achieve with a typical classroom education. There are different language modalities used in educational setting where students get varied communication methods. A number of countries focus on training teachers to teach deaf students with a variety of approaches and have organizations to aid deaf students. Children may be identified as candidates for deaf education from their audiogram or medical history. Hearing loss is generally described as slight, mild, moderate, severe, or profound, depending upon how well a person can hear the intensities of frequencies. Of the children identified as deaf, only 5% are born to deaf parents. This percent of deaf students may have a linguistic advantage when entering the education system due to more extensive exposure to a first language. In cases of congenital hearing loss (hearing loss from birth), parents can start to notice differences in their children's hearing as soon as newborn to three months old. If a child doesn't respond to sudden loud sounds, this could be an indication. As the baby begins to age to around four to eight months, they should turn their head towards where the sound is coming from. Around a year to 16 months, if they don't pronounce words correctly, or don't speak at all, this could also be an indication. All those are indications of congenital hearing loss, which means the child was born this way. A child can also acquire hearing loss at a young age due to a middle ear infection, a serious head injury, exposure to loud noises over a long period, and many other causes. If this occurs, the same symptoms will occur as they do with congenital hearing loss.