Two students drawing geometrical shapes on the chalkboard. A student is also using a scale while students…
"An artificial sphere on whose surface is drawn a map or representation of the earth." -Whitney, 1911
Students work on math in front of the class using an early abacus and writing on the chalkboard.
Three students playing a math game in the classroom, throwing beanbags into a circle and doing multiplication…
Two students measuring the blackboard. The boy is using a ruler and the girl is using a yardstick.
A teacher watches a group of students weighing apples and writing out measurement problems on the chalkboard.