Stem changing verbs: O>UE
One of the forms of stem-changing verbs is called O to UE. That's because the O in the stem of the verb changes to UE in all of the forms except vosotros and nosotros. Some folks call stem-changers "boot verbs" or "shoe verbs" because of the way they look on the verb chart. Use these resources to learn more.
Music videos and activities for practice
Online Grammar Lessons with worksheets
Stem changing verbs