Putting knowledge to work. Comprehension implies the understanding of information and the ability to see basic relationships. The 26 lessons in this unit provide plenty of practice in areas that emphasize comprehension. Students are involved in interpreting verbal and visual communications (A dinosaur "size chart" is provided. "How long was the Tyrannosaurus?"), making comparisons (Using the Table of Contents provided: "Which chapter is shorter?"), and finding relationships with the "big picture" (Using the map of the Lone Star Camp: "Where does the trail from the cabin lead?"). The sequential activities featured here are sure to develop critical thinking skills.