The world's history resources have typically focused upon the famous and the infamous. What I love about newspapers is the recording of data for ordinary people as well.
I found this little story in the Hannibal Clipper from 1875, which names the sixth grade students at Hannibal's South School. The teacher, J.W. Ayres, was my great-grandmother's first cousin. Note the varying ages of the students in sixth grade.
Report of Room No. 1 South Hannibal School, for First Quarter, ending Nov. 12, 1875.