Thanks to contributor Chris Hester, who flagged up an old piece that he wrote possibly for his magazine Adventure Coder. Teacher Trouble was a text adventure game due for release in 1986 by Anthony Collins, author of Nythyhel and various other games.
Although a ZX Spectrum version exists, the C64 version is still at large. Was it even actually ever started as a conversion?
Strident (see comments) suggests that Chris may have picked up details about this game from an Adventure Probe interview with Tony, where it was mentioned that he was to release Teacher Trouble for the C64 when the PAW system came out for the machine.
Unfortunately, Gilsoft only produced a Spectrum and CP/M version of that system – so that is likely why it never surfaced. As a resullt, it could well be a case closed already.
Contributions: Chris Hester, Strident