A great way for students to think about and organize what they are reading is to make a bubble map showing the main topics of the chapter and then listing linking information that belongs to each category as they find it in the text. I like to have kids use either Inspiration or my favorite, free, bubble making tool from  http://bubbl.us/ to have students build a relationship grid. Students put the topic in the center with linking bubbles for the sub-topics. As they find facts and information that relate to the sub-topics, they can either create additional linking bubbles or just put the key information under the topic heading. Students can quickly and easily see the relationships and linking information. Here is a sample grid that could be used on the topic of different animals. Students would create a different graph for each animal studied so that they could easily compare and contrast key features and traits. 

Content Relationship Graph