Creating a quiz to test knowledge, then serve up content they didn't get right (Storyline)

You could use T/F variables to track incorrectly answered questions in the pretest. For example: for each question, create a T/F variable with the default value of False. Adjust the variable to True if the user answers correctly.

Use those variable values to determine what content the user needs to review. How you set that up depends on the amount of content, how it is organized, and which questions determine what content the user must review. For example, if there's a custom menu leading to 5 scenes, you could use conditional triggers to require the user to view scenes associated with questions for which the T/F variable still equals False.

It’s worth the effort to learn about variables and trigger conditions, because they provide the real power in Storyline. Here’s more info:

• https://community.articulate.com/discussions/articulate-storyline/the-value-of-variables
• https://community.articulate.com/series/articulate-storyline-360/articles/articulate-storyline-360-user-guide-how-to-work-with-triggers#conditions

These posts might also provide some guidance: 

• TIP: Create a Custom Menu Slide - Articulate Storyline Discussions - E-Learning Heroes 
• TIP: Let the user choose their path - Articulate Storyline Discussions - E-Learning Heroes