The results of the Second Regional Comparative and Explanatory Study (SERCE) indicate that almost two-thirds of Latin American students do not achieve satisfactory reading and math scores. There is a significant learning gap between students from different socio-economic backgrounds, those who live in rural areas and those who belong to indigenous and Afro-descendant groups. Research indicates that student in 3rd grade belonging to the poorest quintile has a 12% probability of obtaining a satisfactory reading score while a student in the wealthiest quintile has a 56% probability of doing so. In mathematics, the probability differs between 10% and 48%.[8] Data from surveys conducted to employers in Argentina, Brazil and Chile developed by the Inter-American Development Bank (IDB) show that a significant proportion of employers face difficulties in finding workers with relevant skills for good job performance, especially behavioral skills.