In this article we will present a study undertaken in the scope of a Content and Language Integrated Learning project, which was implemented at a local private primary school in the Oporto area, Portugal. This project takes into account the promotion of a teaching and learning process based on the fostering of 21st Century skills, the so-called "creactical skills", i.e., critical thinking and creativity into action (Ohler, 2013) and a global and sustainable awareness. By developing an action research project and following a mixed-method research methodology, we analysed the project's implementation, online questionnaires results, and other data including lesson plans, supervision reports/notes, pictures, videos and projects in order to find evidence of practices which foster the "creactical skills". The results show that pupils' critical thinking, creativity, collaboration, and cultural awareness skills may have been fostered, but there is still some work to be done regarding other skills mainly due to teachers' approaches which have to change.