Former teacher Chris Dawson gave a teen a zero for a written exam because she slipped in a reference to their sexual activities, a court has been told.
Convicted wife killer Dawson, 74, is standing trial in the NSW District Court accused of engaging in sexual activities with a then 16-year-old student at a high school where he taught.
During her evidence, the woman – who can only be known as AB – says she was groomed before first engaging in sexual activities with Dawson in his parents’ bed in the second half of 1980.
On her second day on the witness stand, AB at one time became emotional and she was given several minutes to compose herself before continuing her evidence.
Dawson has pleaded not guilty to one count of carnal knowledge, with his lawyers arguing his first sexual activity with the girl did not occur until after her 17th birthday in February 1981.
However, AB has alleged during her evidence that their first sexual activity occurred in about August or September 1980 when she was 16 years old and in his year 11 sports class.

Chris Dawson (pictured with his first wife Lynette before she disappeared) is standing accused of engaging in sexual activities with a then 16-year-old student he was teaching
She told the court on Wednesday that on a written exam, she included a reference to their sexual activities.
AB said she couldn’t remember the exact words but remembered they were for ‘him alone’.
She told the court that by that time she had been engaged in sexual activity with Dawson for ‘quite a long time’.
AB told the court that a friend told her she thought it would be ‘funny’ if she wrote something ‘exotic’ about their sexual activities.
But she says she was left confused when he tore off the part of the exam where she had made reference to their sexual activities and gave her a zero.
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‘I handed it to him hoping he would like that,’ AB said in her testimony on Wednesday.

The court heard how Chris Dawson (pictured) failed the student he was allegedly grooming because she referenced their sexual activities in an exam

Chris Dawson (pictured, with his twin Paul brother in an episode of the ABC program Chequerboard in 1975) is fighting allegations he engaged in sexual activities with one of his pupils over 40 years ago
‘He tore off the portion of that exam and gave me a zero.
‘I was a bit confused by that. As a 16-year-old, you don’t understand why this is going on, but he just gave me zero.’
AB has told the court that she engaged in sexual activities with Dawson in the back seat of his car, in his school office and in a pool while his twin brother was up the other end.
Dawson, a former Newtown Jets player, was last year sentenced to 24 years in jail over the murder of his wife Lynette Simms.
He has maintained his innocence and has lodged a notice of intention to appeal.
The trial before Judge Sarah Huggett continues.

Dawson, a former Newtown Jets player, was last year sentenced to 24 years in jail over the murder of his wife Lynette (pictured, the couple at their wedding)