Teen saves mom's life with science class lesson

Katie Murphy, 14, called 911 after recognizing her mother's medical emergency.

— -- A teen in Wisconsin is being recognized for saving her mother’s life, thanks to a science lesson she learned at school.

Christa told ABC affiliate WISN in Milwaukee that she went to her daughter for help after noticing she was struggling with simple things around the house, like putting toothpaste on her toothbrush.

"Her speech was all mixed up. I was like, 'Maybe she's having a stroke,'" Katie told WISN.

Katie called 911 and her mom was taken to the hospital. Doctors were able to confirm her diagnosis.

"I'm extremely blessed to be sitting here today," Christa told WISN.