Designing original teaching materials can improve instruction by ensuring lessons are tailored to specific objectives and student needs. Teachers understand best what students require, and creating their own presentations, activities, or videos allows flexible design. This process also helps teachers develop expertise in instructional design through reflection on what works well. Students benefit when teachers supplement textbooks with practical exercises in customized materials that engage learners through relevant contexts and personalities. While creating materials requires time, the classroom advantages of original content designed by teachers directly involved in a course can strengthen learning outcomes.