Only three out of 10 children with disabilities in Indonesia are able to go to school, according to a survey by the United Nations children's agency (UNICEF).
Hearing-impaired students typically take about five years to learn to recite and memorise the Koran at the school.
"Now I am able to read and memorise 30 juz (parts) of the Koran," said Muhammad Farhad, a 10-year-old student, who said he wanted to become a cleric one day so he can pass on his knowledge to others.
Indonesia has tens of thousands of Islamic boarding schools and other religious schools that often provide the only way for children from poorer families to get an education.
