On the Musica Sacra forum, gregp writes:
I have a group of grade school kids for 20 minutes once a week; there’s no way I’d attempt to learn Ward for that. We started with WWW’s in September this year, and so we’ve only been through the first 5 chapters, but so far it is perfect for the level of interest, commitment, and enthusiasm that the kids have.
Words With Wings is available here.