On the website version of OPAC, you must enter a reading level.

Enter a reading a level and choose 0, 1, or 2 levels above.

(Example: level with 0 will return only level 6 books.
Level 6 plus 2 will return books with a level from 6-8.)

On the school version of OPAC you are not required to fill in your reading level.

Click the AR button (Red Book above)

Choose from the following search options:

Reading level
AND

Point value
OR
Subject
OR
Author