Your course starts with up to three units that reflect the goals and interests you shared with us when you started. If you'd like to change one or more of your units, visit the Catalog and browse the available topics. When you select the unit you'd like to switch to, you'll be asked to replace one of your current units, since you can only have three primary active units at a time. When you replace an active unit, you lose your history for that unit, so make sure you're truly ready for the change!
