Counting frame up to 20 teacher

Teachers tool to demonstrate additions andsubtractions up to 20. Provided with a board to write on. Write a number on the board and show with the red and white beads the corresponding number picture by sliding the remaining beads behind the white board.Contents:wooden counting frame (82 cm)10 red and 10 white wooden beads (3.5 cm Ø)wooden whiteboard (35 x 14 cm)2 metal hooks