History Hidden on a Chalkboard

Recently I read an article about Haunting chalkboard drawings, frozen in time for 100 years, discovered in Oklahoma school. Another great article.

I was impressed by the beautiful penmanship and cursive writing. The drawings are amazing and I couldn't help but think about the time it took to draw them. I am fascinated by the math wheel and hope that maybe someone will eventually be able to figure out how it works. God was honored!!