Socialization concerns 'added value' to learning materials which pursue the development of additional skills beyond the actual competencies taught. The principle of socialization is fulfilled if learning materials also pursue:
Social skills: Do the materials aim at promoting the social skills of the learners such as the ability to co-operate with others or to develop empathy? Are the learners encouraged to develop new concepts and to look at things from a different perspective?
Intercultural awareness: Does the schoolbook ask learners to reflect upon the knowledge and understanding of their own culture as well as the cultures of other countries and their personal attitude towards them?