Corey Matthews enters court SASK

Corey Matthews walked into Queen's Bench court through the front entrance Monday. (CBC)

The trial of a Regina school teacher and basketball coach accused of sexually assaulting a teenage boy began Monday.

Corey Matthews, 36, taught at Scott Collegiate and later at Winston Knoll but hasn't been in a classroom for the past three years. 

He's also facing a charge for being in a position of authority when he allegedly touched the teen.

The incidents allegedly started in the spring of 2005 and continued for several years. The boy, who was between the ages of 14 and 17 at the time, is now 22 years old.

On Monday court heard that the alleged victim was not on a school basketball team, but was a student.

In his testimony, he told the court that Matthews had intercourse with him twice and that he was made to perform other sexual acts.

Court also heard from a school teacher and a principal who said they noted Matthews spent a great deal of time with students and they often worried if it was too much time.

The trial is expected to continue through to Thursday.

Matthews had earlier been facing other charges related to two other 16-year-old boys, but those were stayed by the Crown. 

Matthews had initially chosen to have a trial before a judge and jury, but has now decided that a judge alone should decide the case.