Teaching pre-service preschool teachers in technology is a challenge. Technology is a fairly new subject in school, students lack experiences and are not aware of the aim of the subject. In addition technology also include the consequences of technological choices for individuals, society and environment. The curriculum for pre-school in Sweden emphasize development of children´s knowledge in science, technology and their ability to identify technology in everyday life. The education of pre-service teachers involves visualization of their own tacit knowledge and experiences to be used in the teaching of technology. Here a course during a three weeks period with 55 pre-service teacher students is presented. They worked in groups with construction exercises, museum visit and outdoor technology walk. The students wrote summaries of the processes together with critical reflections. The written exams on the identification of technology in everyday life were analysed by using the quality markers 4R’s of Doll’s and compared with marks on their examination tasks. Our results show that many students could describe the processes of construction with high quality showing several perspectives of understanding, e.g., the advantage of group activity, their own development of understanding and how to teach children in preschool.