In this video, Nancy coaches Philip on his 16th note, 2-octave contrary motion scales. The 8th note added in between allows the student to be mindful of relaxing the wrist while playing fast 16th notes. Often times, scale practice focuses solely on fast fingers, however we see artistry displayed along side of technique as Philip phrases the arc of the scale and ends with a nice lift-off of the wrist. From Piano Adventures Level 4, Technique and Artistry page 4.