Old attendance records, a land deed and district minutes were among more than 30 documents Maple School students found in 2010. Last week, after various conservation measures, the documents were placed in a permanent display at the Maple School's library.
Jeremy Kriska, Sonia Ehrlich and Emma Farrell found a box containing the historical documents while putting away equipment after a school musical.
"They didn't actually look old," said Kriska, 16, now a junior at Glenbrook North.
Russel Maki, president of the Graphic Conservation Company, which handled the documents after they were found, said his firm mostly did some surface cleaning and long-term preservation.
"They were actually in a fairly stable environment, so they weren't deteriorating," Maki said.
The documents were in a locked box, tucked away at the bottom of a storage closet. When the box was found, a library assistant pryed it open with a screwdriver.
“There is so much in those documents that the children in District 30 can learn about their village," said Judy Hughes, president of the Northbrook Historical Society. "The names of people who are on streets where they may live."
"We found an attendance sheet that had the students names on it," Kriska said. "There were some with a last name like Pfingsten and other street names that we now know."