In principle, a project is something that can be completed, whereas an area is something that will continue to "live indefinitely" (and you may add new projects to the area from time to time.)
What kind of tools are you using? Paper? Simple list app? Outliner app? GTD app?
One "workaround" would be to identify one or more specific completable projects that belong in the area of staff delevopment. In that way you would have something on your projects list to review every week, and you could add new projects later. Or you could easily decide to simply review all your areas routinely every week (I do).
If you are using an outliner app or other type of app with hierarchical capabilities, you could easily define high level "folders" for your areas and have projects organized under those areas. That is what I do. In most apps, this will require you to decide which single area each project belongs to. This is exactly how I like it, so for me this is not a problem - on the contrary, it makes it easy for me to review my projects systematically one area at a time, but some people on this forum have expressed a wish to have each project belong to more than one area, in which case this approach will not work.