Check out this gem from Diane Huseman's class. Common literary themes are posted on the wall. After a read aloud is finished, students discuss in small groups which theme best describes the text.
The group comes to a consensus, writes out their declaration, and then--here comes the meaty part--they justify their thinking using evidence from the text. Each group shares out and a class determination is set; a miniature copy of the cover is posted under the categorical theme.
(Check out the Comp & Flu pages 232-234 about keeping a class record of read alouds, too!)