Sharing my experience b being a phd management scholar...Our dean of business school designed qualitative course for Phd students covering research philosophies, discussed paradigms, and then we covered all methods phenomenology , discourse, intuitive inquiry, grounded their, narrative,case studies, mixed methods.etc.
The course must also include a software component for analysis, like MAXQDA or NVivo or even Excel. Many course designers miss this but a course should introduce basics of a s/w for analysis so students can use and later learn the advanced techniques of it on their own.
If the students are familiar with quantitative methods I would link to and build on that knowledge.
Also, once they (should have) got the idea of what qualitative methods are about, I find it helpful for them to come up with some research questions of their own that reflect the idea of a qualitative approach. Ideally they should carry out a small project that makes them understand the links between research question, gathering and analysing data and how these steps are much more interlinked in qualitative approaches than in quantitative.