Martina is working on a story for her school newspaper about corruption in the local government. So far, she has gathered interview transcripts, school board memos, videos from the local news, and printed files from an anonymous source. What kind of material is she working from?

Martina is working from a variety of materials, including interview transcripts, school board memos, videos from the local news, and printed files from an anonymous source. These materials can be categorized as primary and secondary sources of information for her story. The interview transcripts, school board memos, and printed files from an anonymous source are primary sources as they are original documents or firsthand accounts of events. The videos from the local news can be considered secondary sources as they are recordings or reports based on primary sources.