1665-6180 1665-6180 S1665-61802017000200110 10.32870/ap.v9n1.918 Mexico Mexico Mexico 00 04 2017 00 04 2017 9 1 110 125

2000 2008 Torreón, Coahuila, México 2014 6 1 1 60-73 2000 1-21 2014 17 1 1 111-31 2015 12 2 2 186-93 1997 1 2008 10 1 1 1-18 2014 13 4 4 115-23 2003 2006 8 8 121-54 2016 18 1 1 23-38 2014 2015 5 10 10 1-42 2015 14 1 1 75-88 2011 2005 336 336 251-65 2001 2003 2013 2 2 2 130-40 2005 2015 35 97-98 97-98 34-51 2008 8 21-33 2016 8 2 2 116-29 2008 4 2 2 51-60 2008 2016 2 4 4 1-11 2010 2011 3-25 2016 8 1 1 1-12 2015 18 2 2 355-83 2015 176 819-23 US Department of Education Office of Planning, Evaluation, and Policy Development Policy and Program Studies Service 2009 2003 tercera