Dear Ms. Kaess,
Thank you for posting your request on History Hub!
Records for approximately 400 closed Catholic schools are located at the Archives and Records Center for the Archdiocese of Chicago. Grammar school records may include grades, attendance sheets, test scores and health records. High school records are generally limited to transcripts. Only the student can request a copy of his/her transcript or student file. Open archdiocesan schools maintain their own student records. There are fees for an official transcript or education/graduation verification letter and for genealogical or directory information (which may include pupil’s address, phone number, dates of attendance, and parish).
We hope this is helpful. Best of luck with your research!