Careful study of fossils reveals important information about prehistoric life. One conclusion drawn by many paleontologists is that birds evolved from reptiles, which in turn evolved from dinosaurs. This information-packed book sets forth the evidence found in fossils.

After reading the Level Y books, readers should be able to progress to Level Z.

Use the following to assess whether your student's progress indicates he or she is ready to move up a level:

• Level Y Benchmark Book
• corresponding Running Record
• corresponding Benchmark Quick Check

Benchmark books do not have a lesson plan or worksheets.

Additional Resources
ReadingA-Z.com Printable and Projectable Book