questionnaire (Midgley et al., 2000) of motivational components: level of interest and the perception of self-efficacy. The questionnaires were administered to participants before and after completing the science activity.
The study was conducted by qualitative and quantitative analysis. The analysis method is grounded in inferential statistics and it was performed by means of independent t-test. The comparison between the groups was based on the data obtained from the pre-lesson and the post-lesson questionnaires. The questionnaire reliability was checked by the Cronbach's alpha index for the variable of the students' level of interest in the field of sciences separately from the students' sense of self-efficacy. Additional information was collected based on the questionnaires, correspondence and conversations with the students and the teacher.