It looks like the instructor was trying to do either of the below:
'Dive Today
Following the Dive Today philosophy, you can conduct Enriched Air Training
Dive 1 prior to beginning knowledge development. To apply the Dive Today
option with the PADI Enriched Air Diver course, divers must:
1. Be a certified PADI Open Water Diver or have a qualifying
certification from another training organization; (exceptions
allowed for divers participating in this program during Open
Water Dive Four of the PADI Open Water Diver course.)
2. Successfully complete Practical Application 1 prior to
Enriched Air Training Dive 1. (This is easily conducted as part of
the predive briefing).
3. Listen to your Dive Today briefing as outlined for Enriched
Air Training Dive 1 (Section Two), with divers demonstrating
mastery and understanding.
The Dive Today briefing applies to all student divers who
have not completed Knowledge Development Section 1.
4. Dive with individual enriched air dive computers (you must
personally watch divers to verify that they set their computers
to the correct blend), or you must directly supervise divers
during the dive.
The dive may, of course, be credited for those who continue on in the course.
Discover Enriched Air Nitrox
To earn the Discover Enriched Air Nitrox card, divers must:
1. Be a certified PADI Open Water Diver or have a qualifying
certification from another training organization. (Note: Discover
Enriched Air Nitrox may be conducted concurrently
with the PADI Open Water Diver course. In this case, the
Open Water Diver certification requirements must be met
before submitting the Discover Enriched Air Nitrox PIC Envelope
to PADI.)
2. Successfully complete Knowledge Development 1 (Enriched
air dive planning, care for equipment, hazard management, use and
application of enriched air.) The PADI Enriched Air Diver Manual
is required.
3. Successfully complete Practical Application 1 (using an oxygen
analyzer to determine oxygen content in an enriched air blend, verification
of cylinder content, use of fill log).
Enriched Air Diver
7
An enriched air dive may accompany the program, but is not required.
Successful completion of Discover Enriched Air Nitrox allows the
diver to dive on 32 percent oxygen within the no-stop limits of the air RDP or
an air-based dive computer, to a maximum of 30 metres/100 feet (depending
on previous training and experience) under the indirect supervision of a PADI
professional (Divemaster, Assistant Instructor or Instructor) who is enriched-air
certified.
Indicate “Discover Enriched Air Nitrox” on the PIC envelope - using
either the paper envelope or PIC online method. Divers will receive a card that
clearly indicates the restrictions regarding oxygen content, depth and supervision.
Interested Discover Enriched Air Nitrox divers may continue to complete
the remaining segments of the Enriched Air Diver course to earn the PADI
Enriched Air Diver certification. Please remember that the PADI Enriched Air
Diver video must be viewed in its entirety prior to completing the Enriched Air
Diver certification.'
Didn't really do either...