In the Knowledge Development section,
mastery is defined as exhibiting acceptable
performance on the PADI Open Water Diver
Course Quizzes before participating in the
open water dives. (An exception is that successfully
completing the Discover Scuba Diving briefing meets
the knowledge development requirements for participating
in Open Water Dive 1.) In addition, the student
must exhibit acceptable performance on
the final exam prior to certification. The final
exam may be administered any time after the
final Knowledge Development session.
Acceptable performance may be defined as a score
of 75 percent or higher. This helps you determine whether to retest a student diver. If
a diver scores less than 75 percent, consider a retest, however the certification criteria
is performance based. The student must either score 100 percent initially on
the quizzes and exam, or you must review each item missed until the student
achieves mastery. You must retain a written record of the Quizzes and
Exam, and students must sign and date the student statement at the end of
the answer sheet to verify that they reviewed and understand all questions
they missed. It is recommended that students also initial missed questions.
from the PADI Instructor manual.....