A student doing an algebra problem on the chalkboard.
This chalk board also offers abacus-like beads at the top for keeping track of tallies.
A girl is measuring the chalkboard using a yardstick. There are conversions written on the board.
A girl doing math problems on the chalkboard.
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…
Three students work from using dots as counters in columns (left) to writing the symbolic number (right).
A teacher helps students do math with a sand table, a predecessor to the abacus.
A cartoon of a schoolteacher and a young boy, who is holding open a book. A chalkboard decorates the…
A teacher showing a math problem on the blackboard in front of the class.
A teacher watches a group of students weighing apples and writing out measurement problems on the chalkboard.