Click on Accelerated Reader, then Record Books and Targets
Select the Class and then click on Reading Practice Quizzes
In the list of pupil names on the left, click on the name of the pupil who needs the test resetting.
Find the book/test you want to reset and click Delete for that book. This will reset the test for that book.
Once the Reading Practice Quiz is deleted the pupil will be able to retake the test.