The purpose of this study is to identify the understanding of school leaders on the implementation of LINUS programme that based on the features contained in the Implementation Model of Van Meter and Van Horn (1975). The study was carried out in the form of qualitative method and particularly, the multiple case studies that were conducted in four schools in Hulu Langat Selangor. The criteria of the subject locations included as follows schools with small size students, majority of the students were Orang Asli, the LINUS programme did not met the schools' objectives and schools with moderate achievement of LINUS. Four Headmasters who are the participants of this study were interviewed for the data collected purposes. To back up the interview data, a few sessions of observations and document analysis were conducted. The finding of this study showed that the understanding about the programme's objectives is the major factor that contributes to the success of a government programme. In other words, if the school leaders misunderstand the purpose of the programme, school achievement would be affected. In addition, the Theory of Van Meter and Van Horn Programme Implementation which is modified to include student characteristics can be applied to identify the practitioners' understanding of the LINUS programme.