Class is a great idea.
When teaching and using the "come" command, be sure to do for good things and not just "undesirable" things. Tell her to come to you, then bend over and pet her a little and tell her she is a good girl, and then let her go on her way. Give her an occasional treat for following the command and let her go. This way she won't associate "come" with things she doesn't want to do.
