Entorno journal in its 71st edition, articles from the areas of Social Sciences, Commerce and Administration, Environmental Ecology, Psychology, Health, Humanities and Education presented, providing new knowledge to the world scientific community. This edition includes the following articles: "Simplex method of linear programming applied to a furniture distribution company”. “Management of organic waste and provision of home gardens, Millpo Ccachuana, Huancavelica, Peru". "Psychometric evidence of the SISCO SV Inventory of Academic Stress in salvadorean university students". "Activation of the National System for the Protection of Children and Adolescents from the salvadorean educational context". "Educational inclusion or exclusion: Dichotomy of the salvadorean educational system". "English Language Learning in English Language Teacher Education in El Salvador". "The assessment of educational research based on an andragogical approach”. “The simplex method of linear programming as applied to a furniture distribution company”.