I created an intensive multi-day workshop on World Creation in speculative fiction, which I first taught at the Creative Futures Academy in conjunction with University College Dublin. I've since taught it at Grub Street Literary Center in Boston. The process I developed also works well with historical fiction (and really any "genre" fiction that doesn't take place in the mundane here-and-now). I'd love to bring it to your organization or institution.
Shorter workshops I've devised and taught, which I'd also love to present, are:
Narrative Reinvention: Improving Your Own Storytelling With Shakespeare's Help
and
Characters In Context: Creating Characters Who Belong Where You Put Them