100-year-old blackboards with lesson plans found behind Oklahoma high school wall BY Melissa Chan NEW YORK DAILY NEWS Published: Tuesday, June 9, 2015, 4:10 PM Updated: Tuesday, June 9, 2015, 4:41 PM KOKH Contractors renovating classrooms at Emerson High School in Oklahoma City found chalk lessons from 1917 behind the walls. Perfectly preserved lesson plans scrawled on blackboards from nearly a century ago were found behind the walls of an Oklahoma high school. The chalkboards, believed to date to 1917, were discovered in three Emerson High School classrooms in Oklahoma City last week by contractors during school renovations, shocked educators said. "I got goosebumps, and then I got tears in my eyes, and then I sat in here and just stared because it's really like, it was like walking into a time capsule," Principal Sherry Kishore told WAFB 9 News. Colorful drawings and cursive writings show how lessons in math, music and the history behind Thanksgiving were taught about 100 years ago. "When you walk into these rooms, it's like they just left the lesson, and they're expecting to come back the next day and start again," Kishore said. "It was very emotional for me." Contractors renovating classrooms at Emerson High School in Oklahoma City found chalk lessons from 1917 behind the walls. School officials will decide how to further preserve the blackboards.