This document presents the research proposal on evaluating the effectiveness of blended learning in improving English writing skills among diploma students at KPTM. The study aims to compare writing performance between students who use blended learning versus face-to-face learning, examine how student motivation contributes to performance with blended learning, and identify the most suitable learning approach. The research will employ an experimental design with pre- and post-tests to measure writing performance, questionnaires to assess student motivation, and document analysis to evaluate different learning approaches.