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Instructional material development is vital in filling the gap in the learning needs of students. Many research found that using varied instructional materials contributes to better student achievements. This study focused on developing and evaluating a task-based material to be used by Grade 11 students in the Accountancy Business and Management strand. This research analyzed the validity and readability of the developed task-based material in Business Mathematics employing the descriptivedevelopment method. The task-based material was evaluated along content, face, presentation and organization, and accuracy and up-to-dateness of data. The developed task-based material has high validity index in terms of content, face, presentation and organization, and accuracy and up-to-dateness of data. In terms of the readability test, the material is fairly easy to read and comprehensible to at least Grade 5 students. It is recommended that the material be subjected to pilot testing, vetting, approval, and intellectual property right application.
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