Pilots reported loss of situational awareness caused a near mid air collision.

Attributes
ACN	1662051
Time
Date	201907
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Champion Citabria Undifferentiated
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Other Landing Pattern
Flight Plan	None
Aircraft 2
Make Model Name	Grumman Corp Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Other Landing Pattern
Flight Plan	None
Person 1
Function	Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 65 Flight Crew Total 2805 Flight Crew Type 1400
Person 2
Function	Trainee Pilot Flying
Qualification	Flight Crew Private Flight Crew Instrument
Experience	Flight Crew Last 90 Days 42 Flight Crew Total 210 Flight Crew Type 50
Events
Anomaly	ATC Issue All Types Conflict NMAC
Miss Distance	Vertical 75

Narrative:

While on final to [runway] xxl to full stop landing; both the my student and I became aware of an aircraft in close in and behind us when tower cleared aircraft Y to land [runway] xxl and the plane called [runway] xxl short approach. At that time; we were probably 1/8 of a mile from the threshold and 150 AGL. I announced that we were short approach [runway] xxl. At that time; tower told the aircraft Y to go around side step left. I witnessed two aircraft shadows of approximately the same size and merging. I called 'my plane' taking the controls and nosing down lower as aircraft Y went over the top of us; missing by 50-75 estimated. I queried the tower whether I was still cleared to land [runway] xxl. Tower replied confirmed we were; so I continued the landing on [runway] xxl and taxied in to the ramp.after securing the aircraft; we saw the CFI and student pilot of aircraft Y; asking them if they were the aircraft Y who had told to go around on [runway] xxl to which they confirmed. I asked them if they had seen us on short final to which the student pilot said 'no' they had not.a subsequent call to the tower indicated that it had been a very close near miss.

Original NASA ASRS Text

Title: Pilots reported loss of situational awareness caused a Near Mid Air Collision.

Narrative: While on final to [Runway] XXL to full stop landing; both the my student and I became aware of an aircraft in close in and behind us when tower cleared Aircraft Y to land [Runway] XXL and the plane called [Runway] XXL short approach. At that time; we were probably 1/8 of a mile from the threshold and 150 AGL. I announced that we were short approach [Runway] XXL. At that time; Tower told the Aircraft Y to go around side step left. I witnessed two aircraft shadows of approximately the same size and merging. I called 'MY PLANE' taking the controls and nosing down lower as Aircraft Y went over the top of us; missing by 50-75 estimated. I queried the Tower whether I was still cleared to land [Runway] XXL. Tower replied confirmed we were; so I continued the landing on [Runway] XXL and taxied in to the ramp.After securing the aircraft; we saw the CFI and student pilot of Aircraft Y; asking them if they were the Aircraft Y who had told to go around on [Runway] XXL to which they confirmed. I asked them if they had seen us on short final to which the student pilot said 'No' they had not.A subsequent call to the Tower indicated that it had been a very close near miss.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.