This thesis, an explorative case study, provides insights into the implementation of inquiry-based learning in an authentic classroom. For one year, a teacher was accompanied while implementing inquiry-based learning in a highly diverse class. In doing so, the observations focused on strategies for both scaffolding and dealing with diversity. Additionally, data reflecting students' views of scientific inquiry were gathered. The results show a successive implementation of inquiry-based learning through four phases supported by various scaffolding strategies. The views of scientific inquiry are discussed on both the class and the individual level. Finally, all these findings are brought together to paint a vivid picture of the investigated class.