In this technological era we live in, the educative scenario is changing rapidly and significantly due to the incorporation of the Internet. Therefore, education should pay special attention to society needs considering the information and communication technologies (TICs) essentially in the teaching process in order to make students ready for this changing society. This paper is focused on the implementation, assessment and analysis of a computer-based approach, a WebQuest, in a third year of compulsory secondary education. The didactic unit implemented deals with the different English-speaking countries and their particularities. The new approach has been carried out using in-class sessions together with autonomous work and group work. The purpose of this study is to analyse and discuss students' opinions and reactions towards the use of this new teaching and learning strategy in an English as a Second Language class. In this sense, the study aims at showing whether students 1) gain a higher motivation in learning English, 2) have improved their digital competence and 3) have acquired cultural competence. The results show that the use of new technologies have motivated students towards the teaching and learning of the English subject, improving their digital competence as well as their cultural competence.