Lawyers for the Mifflin County School District filed a motion on Tuesday to quash the defense subpoena, citing federal and state laws that govern disclosure of various school records.
The records pertain to the young man described in court records as "Victim 9."
The school district said Sandusky has asked for records involving classroom achievement, discipline and mental health issues, among other things.
Sandusky, 68, a former Penn State assistant football coach, is awaiting a June trial on 52 criminal counts for alleged sexual abuse of 10 boys over 15 years. He has denied the allegations.
On Monday, the Keystone Central School District filed a similar motion regarding "Victim 1," and last week state prosecutors objected to the use of defense subpoenas.
Sandusky's lawyers said Tuesday they planned to respond in writing to the objections. Judge John Cleland has given them until Thursday morning to respond to various issues regarding the subpoenas that were raised by the attorney general's office.
Mifflin Co. schools' motion to quash: http://bit.ly/ITkFww