English

Practice talking to them in English. Read books. Practice writing din. Explain the rules in a simple manner. Ok din manood ng English shows/movies/news kasi andun yung common expressions, intonation, pati listening practice. Do this in moderation lang para hindi maubos ang oras nya kakanood. Finally, be patient. Hindi nila mape-perfect yan nang isang turuan lang. Correct, but don't humiliate :)