Possible Clues:

• Class for aliens, briefly
• School subj. for an au pair
• Subj. that helps people assimilate
• Night-school class: Abbr.
• Some aliens take it: Abbr.
• Course for new arrivals: abbr.
• Class for non-native speakers: Abbr
• Subj. for recent arrivals
• Course for new immigrants: Abbr
• Adult ed course, often