A Swampscott teacher charged with trying to run down her ex-husband’s girlfriend Tuesday night lost her visitation rights last week after she told her 8-year-old son she wished the other woman were dead, according to prosecutors and court records.

Kimberly English, 49, who said she is bipolar in a recent court affidavit, was held without bail after she was arraigned on a charge of assault with intent to murder for striking Anna Champagne, who prosecutors said is dating English’s ex-husband, Carl Schroeder.

English pleaded not guilty at her arraignment yesterday and claimed damage police found on her car was from a minor traffic accident she’d had in Revere. English, who has been placed on leave from her job as a special education teacher at a Lynn elementary school, is also charged with violating a restraining order.

Schroeder told cops his 8-year-old son told him English said last week, “I hope Anna dies,” according to a police report.

“Mr. Schroeder also said the (court-appointed guardian) suspended visitation of the children last week because of Ms. Englishs (sic) erratic behavior,” the police report said.

The crash occurred Tuesday night outside Schroeder’s Swampscott home. Champagne was hospitalized with internal injuries and possible broken bones. A spokeswoman for the Essex District Attorney’s Office said the injuries were serious but not life-threatening.

Assistant District Attorney Erin Bellavia said Schroeder had just come home with his two children and Champagne at the time of the crash.

“They were bringing in groceries when he heard Miss Champagne crying and screaming for help,” Bellavia said.

“Officers observed fresh tire marks on the curb in front of the home, approximately 15 feet in front of where Miss Champagne was lying.”