This paper provides new evidence on the effect of pupil´s self-motivation and academic assets allocation on the academic achievement in sciences across countries. By using the Programme for International Student Assessment 2006 (PISA2006) test we find that both explanatory variables have a positive effect on student´s performance. Self-motivation is measured through an instrument that allows us to avoid possible endogeneity problems. Quantile regression issued for analyzing the existence of different estimated coefficients over the distribution. It is found that both variables have different effect on academic performance depending on the pupil´s score. These findings support the importance of designing focalized programs for different populations, especially in terms of access to information and communication technologies such as internet.