The first lab session in Botany I was to familiarize yourself with the microscope. Mr. Pride accomplished this by having us sketch a diagram of the scope we would use in the lab. We were allowed a ruler, pencil and an eraser to accomplish this. Below is a scan of page one in my Botany lab sketch book.
Note the date of April 26, 1957
In those days they used E for excellent, G for good and F for fair.