It was no ordinary day back on June 5th, 2015, when renovation crews at Emerson High School in Oklahoma City discovered a hidden treasure that had been concealed for almost 100 years. Behind the whiteboards in three of the classrooms were well-preserved blackboards from 1917. The blackboards contained cursive writings, a calendar, story of the first Thanksgiving, an unusual math wheel and creative writing. Take a look at these treasured drawings that were discovered and the stories they told.

Isn’t it amazing how well-preserved the drawings were? If you enjoy old treasures, make sure to check out the Oklahoma Century Chest.

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