0124-2253 0124-2253 S0124-22532020000300259 Colombia 00 12 2020 00 12 2020 39 259 261 2008 21 21 2002 24 2 2 151-5 Ministerio de Educación Nacional 2019 2008 2011 81 1 1 61-82 2015 40 9 9 1550-9