Use prerequisites to add instructional scaffolding to your training. Prerequisites can be set for Modules, Topics, and Concepts. To set a prerequisite, navigate to the level above the one you want to add a prerequisite to. LevelWhere Prerequisites  Are SetModule Mastery Profile: Modules tabTopicModule: Topics tabConceptTopic: Concepts tabSample Scenario Tristan wants his learners to learn about safety equipment before they learn how to handle toxic substances. Therefore, he wants to set the Personal Protective Equipment Topic as a prerequisite to the Handling Toxic Substances Topic. To do this, he edits the Safety Training Module that both Topics belong to, and views the Handling Toxic Substances Topic. He then clicks +Prerequisite and adds his prerequisite.