The team then experimented with new teaching methodologies, and developed a new system, which spread to other cities in Java.[14] In 1988, the team received recognition from the provincial Ministry of Religious Affair bureau.[14] By 1992, the Iqro books were sold throughout the country.[14] The proliferation of the books were combined with the establishment of a schooling system known as Taman Pendidikan Al-Quran ("Quranic kindegartens", TPA).[14] The TPAs were initially organized in local mosques sponsored by local initiators.[5] Eventually, the local schools came under the umbrella of a semi-official confederation known as the "Organizing Body for the Youth Groups of Indonesian Mosques" (Indonesian acronym: BKPRMI).[5][15] The BKPRMI trained TPA teachers on the Iqro method and materials.[16]