Kartini Emergency School's students and the 'Twin Teachers' throw baby catfish bought by the twins into the pond near the school. When it's time to harvest, the catfish will be cooked for students' meals. Since the early 1990s, twin sisters Sri Rosyati (known as Rossy) and Sri Irianingsih (known as Rian) have used their family inheritance to set up and run 64 schools in different parts of Indonesia, providing primary education combined with practical skills to some of the country's most deprived children.