The investigation has had for aim develop the didactic strategy "Means - end "in the learning resolution of mathematical problems in the pupils of the fourth degree of primary education in the district of Rioja. The hypothesis, it was formulated in the supposition that the didactic strategy "Means - end" influences significantly in the learning resolution of mathematical problems. The variables are organized in two: independent variable represented by the didactic strategy "Means - end" and dependent variable, which refers to the learning resolution of mathematical problems. The study developed with 9 students that it corresponds to the sample of study, determined by means of the sampling not probabilístico accidental. The investigation is of type applied, of experimental level, of design of preprueba - posprueba with an alone group, which is located in preexperimental designs. To the s...