Antonyms for the term "written materials" could include verbal communication, oral presentations, or digital media. Verbal communication refers to spoken conversations or dialogues, which can take place in person or remotely. Oral presentations involve sharing information through speeches, lectures, or demonstrations, and may include visual aids. Digital media encompasses various forms of electronic communication such as videos, podcasts, and social media posts. In contrast to written materials, which are typically static and require a person to physically read and process information, these antonyms offer more dynamic and interactive ways to share information and ideas.