Are there headings on the syllabus that indicate larger units of material? For example, if you see that a paper comes at the end of a three-week unit on the role of the Internet in organizational behavior, then your professor likely wants you to synthesize that material in your own way. You should also check your notes and online course resources for any other guidelines about the workflow. Maybe you got a rubric a couple weeks ago and forgot about it. Maybe your instructor posted a link about “how to make an annotated bibliography” but then forgot to mention it in class.
With my stats class, the only way of knowing materials/big assignments are coming is looking at the modules as the professor has not and will not express any reminders or talk about it at all in class. I don’t even know the reason why I’m going to class. If most of us have to look online, he doesn’t talk about anything.