Title:The influence of vocabulary acquisition in the improvement of oral expression / Design of a booklet based on vocabulary acquisition to improve oral expression
Title:The influence of the group activities in the development of the listening comprehension / To design a system of group activities to improve the level of listening comprehension
Title:Influence of skimming technique in reading comprehension / design a system exercises of short readings focused on skimming to develop reading comprehension
Title:Normalized gain and least squares to measure of the effectiveness of a physics course / Ganancia normalizada y mínimos cuadrados para medir la efectividad de un curso de física