The current study comprises the views of the pre-service English language teachers on the process of coursebook evaluation and creating supplementary activities for the coursebook written for the fifth graders at middle schools in Turkey. The participants included seniors in the Department of Foreign Language Education at a state university in Turkey. A qualitative approach was adopted and semi-structured interviews were used. The data were subject to content analysis. The results indicated that the participants valued the coursebook evaluation activity due to the contribution of this activity to their professional development, which encouraged them to use previous knowledge and skills. Moreover, the participants also noted that creating supplementary materials helped improve especially their self-confidence.