Storyline - Knowledge Check

There are different ways to do what you want. Here's one way:

Create a T/F variable to track whether the user chooses the summary path. For example, have the default value be False. Change it to True when the user clicks whatever they click to go to the summary. Be sure this trigger comes before any trigger that jumps to another slide.

On the Failure layer of the Results slide: 

• Have a button that jumps to the full content. 
• Have a button to Retry the quiz. Give this button the Initial state of Hidden.
• Add a trigger that changes the Retry button to Normal when the timeline starts on the layer with the condition that the variable = False.

A user who does the summary, fails the quiz, and then goes through the full content still needs to retry the quiz. So on the slide before the quiz, have these triggers run when the timeline starts on the slide:

• Change the variable to False.
• Reset the Results of the quiz.

This is demonstrated in the attached file.