Herrera Aguirre, Isidra Deydania and Herrera Lira, Hazell Melania (2016) Effectiveness of the Strategies Used by the English Teacher at Yelba Maria Antúnez Institute of Ocotal, to Teach English Vocabulary through Songs to 11th Grade Students, during the 2nd Semester 2015. Otra thesis, Universidad Nacional Autónoma de Nicaragua, Managua.