Some Accelerated Reader reports show students' average book level.
Each student's average book level is weighted based on the word count of each book read. Only quizzes that the student passed are included in the calculation:
[Sum of (word count x book level x % correct)] / [Sum of (word count x % correct)]
For example, a student with a Star Reading Grade Equivalent score of 8.0 is likely to have a Zone of Proximal Development range of 4.5-8.0. That student might read the following books and receive these scores on the Reading Practice Quizzes:
| Title | Author | ATOS Book Level | Points | Word Count | % Correct |
|---|---|---|---|---|---|
| Black Beauty (Unabridged) | Sewell, Anna | 7.7 | 11.0 | 59,635 | 100 |
| Little Women (Book I and II) | Alcott, Louisa May | 7.9 | 33.0 | 183,833 | 100 |
| Hansel & Gretel | Grimm, Brothers | 4.8 | 0.5 | 2,826 | 100 |
| Sword in the Stone | White, T.H. | 7.5 | 16.0 | 90,876 | 100 |
| Jungle Book II, The | Kipling, Rudyard | 8.0 | 11.0 | 63,340 | 90 |
The student would have an average book level of 7.8:
| Word count x book level x % correct | Word count x percent correct | |
|---|---|---|
| Black Beauty | 59635 x 7.7 x 100% = 459189.5 | 59635 |
| Little Women | 183833 x 7.9 x 100% = 1452280.7 | 183833 |
| Hansel & Gretel | 2826 x 4.8 x 100% = 13564.8 | 2826 |
| The Sword in the Stone | 90876 x 7.5 x 100% = 681570.0 | 90876 |
| The Jungle Book II | 63340 x 8.0 x 90% = 456048.0 | 57006 |
| Sums | 3062653.0 | 394176 |
| Divide the sums: | 3062653 ÷ 394176 = 7.76 (round to 7.8) | |
Weighting the calculation gives teachers a better indicator of where the student spent the majority of the time reading. More weight is given to books that are longer and possibly more challenging for the student. Also, when students want to enjoy a lighter, easier reading experience (such as a best-seller that the student's friends are reading), the book won't have as much weight as more challenging titles that the student might spend several days or even weeks reading.