A Sydney teacher has been cleared of allegations he indecently assaulted three young female students in Sydney's lower north shore.

Key points: Simon Phillips was arrested and charged in 2017

Simon Phillips was arrested and charged in 2017 He denied 12 counts of aggravated assault against three girls aged between 11 and 12

He denied 12 counts of aggravated assault against three girls aged between 11 and 12 The magistrate said there was no evidence Mr Phillips had a sexual interest in children

Simon Phillips was teaching at Mowbray Public School in Lane Cove North when he was charged in November 2017.

The 53-year-old denied 12 counts of aggravated indecent assault against three girls, aged 11 and 12 at the time.

Burwood Local Court heard the main complainant alleged Mr Phillips had pressed his penis against her back through his clothes, kissed her forehead and slapped her buttocks.

She claimed Mr Phillips "did something that made her feel uncomfortable every day".

Mr Phillips, a father of two, had previously told the court he viewed his role as being "like an extra parent".

His defence team admitted he used a number of "unusual" teaching methods, including holding hands with students to get their attention, shaking hands to greet them and farewelling them at the end of each day.

During his judgment, Magistrate Daniel Reiss highlighted the risk of contamination of evidence due to the witnesses having discussed the matter among themselves.

Mr Reiss said the recollection of some witnesses appeared to have been influenced by what they had subsequently been told.

"There were a number of areas of contradiction of witnesses. Some of those aspects are significant," he said.

There was no evidence Mr Phillips had a sexual interest in children, the magistrate noted.

Mr Reiss dismissed all charges, prompting clapping and cheers from Mr Phillips' supporters in court.

Simon Phillips said he has no plans to return to his teaching career. ( ABC News )

On leaving court, Mr Phillips said he had no plans to return to teaching.

"It's taken an incredible toll," he said of the case.

"As you would expect, being accused of these horrendous charges impacts greatly on your personal career and also private life.

"But we've been very fortunate to have excellent representation and excellent support from hundreds and hundreds of people."