The purpose of this study was to compare the effects of questioning "during" a read-aloud and questioning "after" a read-aloud, using science-related informational tradebooks with first-and second-graders. Three thematically-related tradebooks were used, each portraying a scientist involved in authentic investigation. Students in two first/second grade classrooms were engaged in three read-aloud sessions. One group was engaged in discussion of text ideas during reading, while the other group engaged in discussion only at the conclusion of the read-alouds. After-story posttest results revealed minimal differences in scores between groups. However, students in the during-reading group demonstrated statistically significant differences in their pretest/posttest gain scores. This suggests that the cumulative effect of exposing students to multiple texts focusing on the work scientists do did affect students' building a robust representation of text ideas. Furthermore, these results suggest that pairing thematically-related texts with discussion during the read-aloud, cuing students to important ideas and encouraging text-to-text connections as they are encountered, was more beneficial than engaging students in similar discussion after reading. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]