Bruce Robert Arnott abandoned a hearing into several sets of allegations before Albury Local Court this week, changing his pleas to guilty.

One involved him being interviewed by police at Mungabareena Reserve - where he was camping and a day later allowed a fire he lit to get out of control - wearing nothing but a shirt.

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He told them he wanted to "air" an area of his body that had undergone surgery, but police said the surgical wound was on his upper torso so he should have worn shorts but no shirt.

Arnott will now be be sentenced on September 26.

The 63-year-old taught at Glenroy Public School for many years.

But Arnott hasn't been working while the NSW Department of Education awaited the outcome of his case.

He pleaded guilty to larceny, enter enclosed lands without lawful excuse, drive with a low-range prescribed concentration of alcohol, offensive behaviour, wilful and obscene exposure, causing fire and being reckless as to its spread and, previously, to contravene an apprehended violence order.

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The court heard Arnott and a fellow Glenroy Public teacher had worked with each other for about 10 years before becoming partners.

But on January 6, six months into their relationship, they argued at her home and she ordered him to leave and never return, though he did collect belongings the following day.

Arnott booked into Lavington's Northside Hotel on January 9, then about 7.35pm left his room and walked naked around the car park, speaking to other guests or standing in his doorway.

The next day, about 4am, the ex-partner was asleep on a couch when she woke to hear her electric garage door opening, then noise from the back yard.

Fearing it was Arnott she called police, who on arrival found him reclined in the driver's seat of his car, which was in the driveway.

At 7.45pm, someone who saw Arnott in various states of undress at the reserve called police, who gave him a breathalyser test as he had driven to get newspapers. His reading was 0.058.

The AVO breach happened on January 11 when he drove into his ex-partner's driveway, then a couple of hours later police were called to the camp fire that burnt 500 square metres of grass.

Five days later he stole a $200 mobile phone at Bike Culture, Albury.