Possible Clues:

• Course for intl. students
• Night class subj
• Alien's subj.
• Immigrant's class: Abbr
• Course for U.S. immigrants
• Subj. for a non-native speaker
• Immigrant's course, for short
• Subj. for some new immigrants
• Subj. for recent immigrants
• Subj. for U.S. newcomers