Keep in mind, these exercises are not exclusive to jazz pianists. All instrumentalists, even advanced ones, can reap the benefits of singing and playing through these improvisation exercises. Remember to sing accurately and slowly through all keys. Rushing through each exercise will only add frustration when you are trying apply these concepts later on.
A preview of the the 10-part .pdf download can be viewed here: Chord Tone Improvisation Part 1: Chromatic Embelishments (via Scribd.com). A download is available be clicking the "Add to Cart" button under the top right hand sidebar.