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 tackling these, each child has got the chance to develop values and behavior for a sustainable future planet and a positive society transformation based on equality, respect towards diversity, and the finding of solutions to glocal problems. By developing an action research project and following a mixed-method research methodology , we analysed the project's implementation, online questionnaires, 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, collabora-tion, 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.