Schoolgirl Ashley McCormick, 13, was crossing at the designated spot in Byfield, Northamptonshire, at 8.15am on Friday. She slipped and a white car drove past her and ran over her foot.
The year nine pupil suffered a broken ankle, and will have to keep her leg in a cast for at least the next fortnight.
Her mum, Leanne, told their local paper she was 'fuming'.
"I'm fuming as I just can't believe the driver did not stop," she said. "It's heartbreaking to see her like this as she loves football and running and she can't do that at the moment.
"I can't believe the driver wouldn't have realised as she would have screamed. I think she was in a lot of shock and pain when it first happened but over the last couple of days she has felt more angry that the driver didn't stop."
She said that Ashley had 'put on a brave face' but was still getting upset at night over the accident.
She added that although the 'callous' driver failed to stop, many passersby did come to Ashley's aid.
"It's heartwarming to know there were so many people who were willing to stop and help a person they didn't even know," she said.
Police are appealing for witnesses to the collision and ask anyone with information to call Northamptonshire Police on 101 or Crimestoppers on 0800 555 111.