Welcome to SolidWorks forums Or.
The only option is to save these files as IGES or parasolid and then you can open them in SW2010. There is no other way to fix these files not even with PDM. In case she needs to just view these files, she can use e-drawings viewer (a free software).
BTW PDM comes with professional or Premium version of SolidWorks. And I'm not sure if it is there in student version.
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thank you very much for the quality info
in student edtion i didn't found any option to save it in diffrrent format other then the regualr or edrawing.
Sorry as I forgot to mention that student versions have limits in exporting the files.
Check this thread and try the suggestiosns: https://forum.solidworks.com/message/241491#241491
I'm not sure of someone converts the student version files of yours into IGES/Parasolid using a commercial version, will student version be able to open them.