Approach to study songs

Hello David;

 I am working on my L2 Study Song, specifcally the fisrt 2 choruses, and it occured to me that i might have missed in level 1, where you may have addressed the ideal approach to learning a study song. Would you recommend learning the entire song at 30%, then at 15%, then full speed, or learning each chorus at 30%, then 15%, then full speed, before moving on to the next chorus? And if the latter approach, THEN learning the entire song at 30%,15%, full speed? I realize either approach would work, but which would you consider ideal?

Thanks,

Greg