DuolingoAlternateScaffold Amy BucherFull size 1370 × 1548 pixels Five Best Practices for Digital Badges for Behavior Change The Duolingo skill tree sequences lessons so they build on one another toward a clearly defined goal state. Previous image Next image Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *CommentName* Email* Website Save my name, email, and site URL in my browser for next time I post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.