The teacher had sexual relationships with 11-year-old and 12-year-old students, one told her he sometimes thought she didn't understand he was still a kid.

Jacqueline Ma, who taught elementary school in National City, is expected to be sentenced to 30 years to life in prison

Jacqueline Ma, the former National City teacher who is accused of sexually abusing her students, changed her plea to guilty during a court hearing Wednesday ahead of her scheduled trial.