Introduction
Key competences are a topic of recent introduction in the Spanish educational system. The adoption of the Organic Law of Education (LOE) 2006 is directly linked to the recommendations made by European education agencies (European Commission, 2005). Competences were introduced into the curriculum of elementary education to give young students the knowledge and skills essential for full participation in society. All started with the DeSeCo Project. Its conceptual framework classifies such competences in three broad categories. First, individuals need to be able to use a wide range of tools for interacting effectively with the environment: both physical ones such as information technology and socio-cultural ones such as the use of language. Second, in an increasingly interdependent world, individuals need to be able to engage with others, and since they will encounter people from a range of backgrounds. Third, individuals need to be able to take responsibility for managing their own lives, situate their lives in the broader social context and act autonomously. Each of these categories has, according DeSeCo, a specific approach, are interrelated, and collectively build the basis for identifying and defining the eight key Spanish competences. Under this proposal made by the European Union, at the Spanish level, it was defined eight key competences to be delivered along Elementary and Secondary Education: 1) Communication skills; 2) Mathematical competence; 3) Knowledge and interaction with the physical environment; 4) Data processing and digital competence; 5) Social and civic competence; 6) Cultural and artistic competence; 7) Lifelong learning; and 8) Autonomy and personal initiative.
It is important to noted that the incorporation of competences in the curriculum should not be understood as a single element to be developed, but should be considered as the axis around which all curricular elements must turn around. This is essential for a conceptual and methodological shifting the educational community. However, to date there have not assessment tools to investigate the impact of the incorporation of the key competences in the curriculum methodological have reached in teachers. Their perceptions, concerns, perspectives and motivations in this process are unknown. Given that teachers are the agents to bring the change, it is necessary to see how this process is being developed. Many studies have the purpose of analyse the study of key competences (Escamilla, 2008; Moya and Luengo , 2010; Sarramona, 2004; Etelälahti and SahiRychen, 2001, Kelly, 2001; Knain, 2001; Lassnigg, Mayer, and Svecnik, 2001). However, few data have been collected on how this process is unfolding, and what is the perception of the teachers as important pieces. It is therefore the purpose of this study, the design and validation of a questionnaire to measure the perception of elementary teachers about the inclusion of key competences in the Spanish context.

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