Psacharopoulos, George; Rojas, Carlos; Velez, Eduardo - Economics Research, World Bank Group - 1992
In the mid 1980s, half of Colombia's rural schools did not offer complete primary education and more than half of rural children between the ages of 7 and 9 had never attended school. Unitary schools - multigrade classrooms taught by one teacher - were established in the early 1960s in isolated...