| Subjective
Criteria |
| Illustrations: No support |
| Dialog: Simple |
| Vocabulary: Many difficult words |
| Language: Many descriptive words |
| Sentences: Some Long/Complex |
| Text structure: Formal |
| Inferences: Several Implications |
| Complexity: Several unrelated ideas |
| Concepts: Concrete/Simple Social |
| Chapters |
| Headings |
| Mature concepts: With common experiences or clear fantasy |