GIFTED students have the opportunity to enhance their academic competence in a three-week educational programme offered by the Hong Kong International School (HKIS). The most distinguishing feature of the ''High Achievers 1994'' programme is its generosity in helping students who are not from the HKIS. In other words, the HKIS is organising and subsidising a programme that will benefit students from other secondary schools. So what is the idea behind the big-hearted programme? Raising money is surely not the reason, as the HKIS actually has to subsidise each of the 70 entrants at $3,000 each, even though each student still has to pay $1,000 to take part in the programme. Some of the students who cannot afford that amount even receive full funding. ''Over the years, Hong Kong has be very kind to the HKIS, and it is only natural for us to give something back to the community,'' HKIS external affairs director Christine Mar said. ''Organising this programme is our way of saying thanks.'' Their way of saying ''thank you'' is to help these high achievers polish their English writing skills, and enrich their physics and mathematics knowledge with the use of hi-tech computer programmes. In all the classes, students sit at computer stations - something they probably do not have to do in their secondary schools. But this is, in fact, one of the aims of the programme. Programme co-ordinator Beatrice Chung Chan Bak-fai said: ''We intentionally shaped the curriculum of this programme to be different from the Hong Kong secondary school curriculum, so that students can learn something they can't learn in their own schools.'' What is different from the secondary school curriculum is the programme's emphasis on ''creative thinking''. For instance, the students working at computer stations are told to focus not so much on achieving flawless grammar but more on generating ideas. With these ideas, the teacher guides the students towards developing their own writing style and strategy, rather than following a pre-set pattern. Teacher David Bicker, who holds writing and English literature classes at HKIS, said: ''The bottom line is to train students to develop their own thinking through writing, instead of the other way around.'' Besides prompting students to express their ideas freely, the programme also creates a competitive yet healthy learning atmosphere. ''Studying among all these high achievers, I feel I have to be even more diligent to stay on top,'' said Chiang Tsek-ming, 16, a Form Five student at Hong Kong Wah Yan College. It is the fourth ''High Achiever'' programme organised by HKIS. The first graduates (Class of 1990) loved the programme, and they set up the ''House of High Achievers'' in a bid to keep in touch with their fellow students. Organising committee chairman Lau Yuk-lun said: ''Besides organising get-togethers for the graduates, we also organise charity work. We think that by offering voluntary service together, we can keep in touch with each other and contribute to society.''