This study aimed to develop and determine the usability of a multimedia module named Propos-Bio multimedia module for the topic of Cell Division. The design used in this study is the developmental design based on ADDIE Model. A total of 44 Biology teachers from 25 secondary schools in Kinta Utara, Perak were chosen as respondents through a random sampling method. Five Biology experts were selected to determine the validity of the multimedia module. Three instruments employed in this study were expert validation, reliability and usability questionnaires. All the instruments were valid and reliable for this study. The data were analysed using percentage of expert agreement to detemine validity, Cronbach alpha for reliability and mean for usability of the module.The finding shows that the developed multimedia module has a good validity and reliability with 93.3% of expert agreement and Cronbach alpha value 0.90. The Propos-Bio multimedia module also has a good usability in ter.....

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