THE provision of school-based remedial English classes for immigrant children from the mainland is the best way to help them tackle language problems, acting Secretary for Education and Manpower Lam Woon-kwong said. Apart from the standard of English, mainland children did not encounter serious learning or adjustment difficulties, he said. ''To help them to tackle the language problem, schools are encouraged to organise remedial classes. To supplement the effort, the Education Department organises intensive English remedial classes.'' But United Democrat legislator Cheung Man-kwong, who represents the education sector, said the remedial classes provided in schools were not basic enough for mainland children. He said if their parents could not afford private tutors, they would have great difficulty in learning.