Final answer:
The available information does not provide details on three specific quality tiers within the E.U. framework, rather it discusses EU values, joining criteria, and educational benchmark scores.
Step-by-step explanation:
The question seems to be seeking information on the E.U. framework for quality tiers, but the provided documents do not contain specific information concerning three distinct quality tiers within the E.U. Rather, they discuss the values to which EU member states commit, the criteria for joining the EU as defined by the Copenhagen European Council, and benchmark scores for educational achievement based on TIMSS results. Therefore, based on the information available, one cannot accurately answer the question concerning the three quality tiers in the E.U. framework, as it appears to be referencing a distinct concept or system not elucidated in the provided references.