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Calero Chavarria, Reyna Carolina and Carvajal Acosta, Aida Cristina (2009) Educational, social, and economical factors that influenced negatively in the students difficulting them in speaking the target language during the five years of secondary school at Camilo Zapata Institute. Otra thesis, Universidad Nacional Autónoma de Nicaragua, Managua.
Obregón Cruz, Jennifer and Alemán Hernández, Sadrac Guillermo (2009) Analysis of factors in the learning process for proficiency in speaking ability in students of the third year at Instituto Tecnico José Dolores Estrada. Otra thesis, Universidad Nacional Autónoma de Nicaragua, Managua.
Triguero Paizano, Santiago (2009) Some teaching defficiencies and physical conditions affect negativily the development of speaking and reading abilities in the students of fifth level at the national institute Robert Drew. Otra thesis, Universidad Nacional Autónoma de Nicaragua, Managua.