This study investigates how pre-service mathematics teachers integrate technology into their classroom practices, which normative behaviour they formulate in the classroom and the relationship between such behaviour and the integration process of technology. The study integrates two frameworks, the Instrumental Orchestration and Sociomathematical Norms (SMNs), to examine technology-enhanced classrooms' micro-cultures. We observed two pre-service mathematics teachers who were the participants of a four-month teacher preparation programme regarding how effectively they used technological tools in line with their endorsed SMNs utilizing a multiple holistic case study. We analysed the data considering eight instrumental orchestration types and six SMNs (three of which emerged from the data). The results indicate a relation between how effectively the pre-service teachers used technological tools in their teaching and whether their endorsed SMNs have a mathematical basis. Although the two pre-service mathematics teachers used the same instrumental orchestration types, the variety of SMNs they endorsed indicated successful technology integration. By integrating an SMN perspective into the instrumental orchestration framework, the study gives researchers and teacher educators insights into the context of the socio-cultural aspect of technology integration.