The Knowledge Check element is a formative assessment tool that can provide feedback.
To add a knowledge check to your tutorial, click + Add and select Lesson.
Name The Lesson and click the Green Check Mark
Then click + Add Element
Select Knowlege Check in the drop down list
Click "+Add Question", and select which kind of question you want to ask
Write some possible answers to your question, and click into the Feedback boxes to explain why each choice is right or why it is wrong. The purpose of a knowledge check is to check the learner's understanding and help them learn(different than adding a Test, which is graded)