Common credit of music aimed at students aged 12-16. Consists of the following contents: symbols and sounds, musical language, the music inside, music at the time. It is to make music, working the vocal expression and get a correct interpretation, learn about morphology and syntax in which the music is structured. In most of the activities proposed are used specific fragments of musical works or works through which content is work. Is based on 6 years of work experience in reform centres I