We just finished Literature Circles, and I had four groups reading four different chapter books - War with Grandpa, Chalkbox Kid, Pick of the Litter, and Fourth Grade Rats. I was so blessed to have 2 parents join us, and each took a different book. We did this for a 20-25 minute period 3 days a week, and it worked for one parent as this was her lunch hour. I met w/ the other two groups and split my time between them. It worked beautifully!