SlideWiki supports the assisted creation of questions.
The respective tool "Easy Question" can be found in the editor menu.
The process includes these steps:
After selecting a text fragment and clicking on the Easy Quest button, you are redirected to the question tab, and a new question is created from the selected text fragment.
Check and edit the question and alternatives, select the appropriate difficulty, add explanations, if necessary, and click the Save button to assign the question to the slide.
For example, the text fragment from the previous slide turned into following question: