Official publicity for mother-tongue education has outraged parents and students, who said it was selective and biased. More than $1 million was spent on the publicity, which included pamphlets, booklets, television, radio and MTR posters. But Chan Yick-man, chairman of the Parent Teacher Association at Cheung Sha Wan Catholic Secondary School, said the material was one-sided and discriminatory. A 12-page pamphlet, distributed to public and primary school students and their parents, made a comparison between mother-tongue and English medium instruction. It said more Form One students, who are taught in English, day-dreamed compared with Primary Six pupils taught in Chinese. 'Day-dreaming is very common among students. It's unfair to link it with English teaching without concrete research and statistics,' Mr Chan said. 'Good examples of learning in English are not mentioned. 'We are not entirely rejecting mother-tongue teaching. But the Education Department should disseminate a more balanced picture.' A student studying in an English-teaching school said she found the material distressing. 'The 12-page pamphlet does not have a single good word to say about English-medium instruction.' A department spokesman said it had no intention of discriminating against English medium.