Researchers at the National Institute for Educational Policy Research surveyed “2,120 students from the fourth year in primary school to the second year in high school, and 259 teachers at primary, middle and high schools, ” says the report.
Para peneliti di Institut Riset Kebijakan Pendidikan Nasional menyurvei ” 2.120 pelajar dari tahun keempat SD hingga tahun kedua SMU, dan 259 guru SD, SMP, dan SMU ”, kata laporan itu.