Common European Framework of Reference for Languages.
外国語の学習到達度を記述するための指針。
レベルはこんな感じに分けられる。
The Common European Framework divides learners into three broad divisions which can be divided into six levels:
A Basic User
A1 Breakthrough
A2 Waystage
B Independent User
B1 Threshold
B2 Vantage
C Proficient User
C1 Effective Operational Proficiency
C2 Mastery
http://en.wikipedia.org/wiki/Common_European_Framework_of_Reference_for_Languages