Your assignment is to find research about the most successful ways adolescents master a foreign language. Try combining some of these terms in the databases below:
"People" words
adolescent; adolescent learners; adolescent development; teenagers; teenage learners; middle school students; junior high school students; high school students; young adults
"Master" words
master; mastery learning; success
"Language" words
foreign language learning; second language learning; second language acquisition