"Oklahoma school replaces chalkboards, finds 98 year old drawings and lessons hidden behind them"

01. When contractors began work on four classrooms of Emerson High School in Oklahoma, they knew their remodel would improve education — but they never expected it would impact local history.

02. Looking to upgrade the rooms with new whiteboards and smartboards, the workers had to first remove the outdated chalkboards. But when they began to pull away the old boards, they made a startling discovery

03. Beneath the current boards rested another set of chalkboards — untouched for nearly 100 years. Protected and totally undisturbed, the century-old writings and drawings looked like they were made just yesterday. Here, a November calendar rolls into December. A turkey marks the celebration of Thanksgiving.

04. A multiplication table gives us a glimpse into the curriculum and methods taught in 1917, techniques perhaps lost in the passage of time. When regarding a wheel of multiplication, Principal Sherry Kishore told The Oklahoman, “I have never seen that technique in my life.”