Nanyang International School (NIS) offers Diploma courses designed to equip students with practical knowledge and foundational skills relevant to their chosen field of study. These courses are conducted through face-to-face learning, combining structured classroom instruction with applied learning experiences that support both academic development and industry awareness.

The diploma courses aim to develop students' professional competencies, problem-solving abilities, and practical understanding of industry practices. In addition to academic learning, selected diploma courses may include industrial attachments, providing students with opportunities to gain real-world exposure and practical experience within relevant industries.

Students' academic progress is monitored through assessments conducted during and at the end of each module, allowing instructors to evaluate learning outcomes and provide guidance throughout the course. Upon meeting the required academic standards and successfully completing all modules, students will be awarded the respective Diploma qualification issued by Nanyang International School.