Workers renovating a high school in Oklahoma City were stunned to find chalkboards from the early 1900s behind the walls.
The series of chalkboards, that appear to have been used in 1917, were discovered in three classrooms at Emerson High School.
Workers renovating a high school in Oklahoma City were stunned to find chalkboards from the early 1900s behind the walls.
The series of chalkboards, that appear to have been used in 1917, were discovered in three classrooms at Emerson High School.