When the Sandinistas came to power in 1979, they inherited an educational system that was one of the poorest in Latin America. Under the Somozas, limited spending on education and generalized poverty, which forced many adolescents into the labor market, constricted educational opportunities for Nicaraguans. A 1980 literacy campaign, using secondary school students, university students as well as teachers as volunteer teachers, reduced the overall illiteracy rate from 50.3% to 12.9% within only five months. The key large scale programs of the Sandinistas included a massive National Literacy Crusade (March–August, 1980), social program, which received international recognition for their gains in literacy, health care, education, childcare, unions, and land reform. In September 1980, UNESCO awarded Nicaragua with the "Nadezhda K. Krupskaya" award for their successful literacy campaign. This was followed by the literacy campaigns of 1982, 1986, 1987, 1995 and 2000, all of which were also awarded by UNESCO.