No, not hopping up and down like in gym class! Jumping Jacks is a finger independence exercise. See your teacher for your uniquely customized jumping jacks exercise or purchase a String-O! booklet to see how Jumping Jacks can help improve your technique.
Options: Sevcik Op. 1 Book 1 contains some great exercises that count in the "Jumping Jacks" finger independence exercise category. Download it for free at imslp.org