The lawyer for a former Vancouver high school teacher charged with sex-related offences involving a dozen female students has accused one of the alleged victims of making up her testimony.

Tom Ellison, 63, is on trial in Vancouver provincial court on 12 counts of gross indecency, three counts of indecent assault and one count of sexual assault involving teenage girls at Prince of Wales Secondary School in the 1970s and 1980s.

Former Vancouver teacher Tom Ellison is on trial for 16 sex-related charges.
(CBC)

One of the women who claims to have had a sexual relationship with the former teacher was cross-examined by Ellison's lawyer, Bill Smart, on Thursday.

Smart accused her of making up her involvement with Ellison, asking her whether she was "just jumping on the bandwagon."

He then accused the woman of using the trial to get revenge on another man who raped her when she was 13.

The woman responded: "You're  wrong."

Smart also suggested that Ellison wasn't around during a summer when much of the alleged relationship happened, but he offered no evidence to support that contention.

He asked the woman: "Did he tell you [that] you were the only one?"

"I thought I was," she replied.

Smart then concluded: "I suggest you weren't one at all."

Ellison was a teacher in the school's Quest outdoor program from 1972 to 1987. Eleven of the 12 alleged victims were enrolled in the program.