Take her to the dentist. My 8 1/2 yr daughter just did this 2 weekends ago. Only hers was all the way grown out already. She didn't chip it, she completely broke off almost half of the tooth, almost to the gum line.
Dentist will xray it to check for damage that isn't visible from the outside (blood vessel supply to the tooth/root), and make an assessment.
Our daughter doesn't appear to have damaged her root or blood supply, so hopefully she will not have further issues with it. The missing section was rebuilt (like a big "filling" only it doesn't fill a cavity, it replaces the missing side of her tooth) and you can't tell she did anything to it. There are still possibilities of problems down the road - darkening of her tooth - almost all dark yellow teeth that you see are from childhood trauma according to our dentist, abscessing, etc. And when she is grown (17 or so) she will need a cap. But so far she is fine... after 2 or 3 days, she doesn't mention it anymore or complain about it feeling funny in her mouth.
Dentist said she can eat apples... just not hard crunchy stuff like peanut brittle. And cannot use it for a "tool" only as a tooth, lol (no opening snack bags or biting of the plastic tag things from clothes, etc).
Most everyone only gets one set of adult teeth after losing their baby teeth. Although there are instances of someone losing a 2nd and getting a third. Just as there are instances of some kids not having an adult/permanent tooth underneath the baby one. This is very unusual, however. So don't expect she will grow another. Take care of this one appropriately, she won't likely get another.
Hope this helps.
So sorry.. it is traumatic for child and mom alike... I know.