Different kinds of efforts have been made in many countries to stimulate students' interest in science and technology, for example through school competitions. Few studies, however,have investigated the effect of school competitions in science and technology. This study centres onhow students participatingin the science and technology school competition The Technology Eightexperienced the outcomesof taking part inthe competition. Semi-structured interviews were conducted with seventeen 15-year-old students. Transcripts of the interviews were analysed based on contentand resulted in four categories: Social effects, Attitude to competitions, Stimulated interest in science and technology and Gained knowledge. The students enjoyed participating in the competition and found that it had a positive effect on the social situationin the classroom. Competitions were also appreciated and seen to encourage students to work harder. However, the competition didnot have much effect in changing interest in science and technology. Finally, the students found it difficult to express how the competition had contributed to gainingmore content knowledge in the subjects, but they emphasised the practical aspects of learning.