Narrative:

While practicing landings on runway xx at ZZZ with a pre-solo student who owns the aircraft; winds calm; traffic very light. A bonanza (aircraft Y) was heard 10 miles to the west; who intended to land on runway xy (opposite runway). I radioed the bonanza that this would be a full stop landing on runway xx and there should be no conflict. On very short final [another] bonanza (aircraft Z) was spotted on the runway and a go around with a right climbing turn was initiated. Runway xy-xx was closed because the bonanza had blown two tires. So we landed without incident on runway xz. I believe there was some confusion about which bonanza was where. I believe that the fact that sometimes pilots give position reports with aircraft type (bonanza) only was a contributing factor.

Google
 

Original NASA ASRS Text

Title: Flight instructor reported another aircraft was observed landing in the opposite direction on the same runway; so a go around was performed to avoid a conflict.

Narrative: While practicing landings on RWY XX at ZZZ with a pre-solo student who owns the aircraft; winds calm; traffic very light. A Bonanza (Aircraft Y) was heard 10 miles to the west; who intended to land on RWY XY (opposite runway). I radioed the Bonanza that this would be a full stop landing on RWY XX and there should be no conflict. On very short final [another] Bonanza (Aircraft Z) was spotted on the runway and a go around with a right climbing turn was initiated. Runway XY-XX was closed because the Bonanza had blown two tires. So we landed without incident on Runway XZ. I believe there was some confusion about which Bonanza was where. I believe that the fact that sometimes pilots give position reports with aircraft type (Bonanza) only was a contributing factor.

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.