We possibly see Jack use levitation magic when helping Ruggie remove Magicam Monsters from campus, and again when helping Ruggie set up a stage in Book 5.
He also seems to use magic during the Stitch event to topple trees and during Playfulland to break things apart.
While he helps Stitch, Grim, Riddle, Lilia and the prefect build a cottage, we do not see him use magic to do so: to their surprise, he carries tree trunks around by hand.
Deuce mentions hitting targets with fireballs during a lesson, which Jack describes as “A simple task in and of itself.”
In Book 7 Ortho describes Jack’s spellcasting as “very refined” after Jack “swatted away (a) whole darkness army at once.”
Along with Riddle, Kalim and Deuce, Jack channels magic into a hair-growth potion during the Lantern event.
Twisted Wonderland Reference Note 