"To write the material" means to create, compose, or develop content or information for a specific purpose, such as an article, book, script, or presentation. Full definition
Similar and related words and phrases are presented below.
Legal writers and editors produce a wide range of written materials for the legal industry. (thebalancecareers.com)
In curriculum development, I have learned two pedagogical frameworks that I utilize in writing materials for inquiry - based learning. (sciencemag.org)
You are free to use and post this infographic without alterations online, in written materials, and in presentations. (ucsusa.org)