![](http://www.alamy.com/thumbs/6/C6A37151-0654-40A9-B274-FB102DD7DE30/2T0TCHD.jpg)
Wooden counting rods used to calculate mathematics using colour and shape in early school books, friends of ten
Size: 4106px × 2002px
Photo credit: © Micha Klootwijk / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: 10cm, 1cm, addition, aid, arithmetic, art, book, books, calculating, calculation, childhood, class, classroom, colour, coloured, compare, correct, count, counting, cuisenaire, desk, educate, education, educational, elementary, exploration, factors, fun, hands, home, kindergarten, learn, learning, length, maths, montessori, number, numbers, numerical, parenting, play, pre-school, rods, school, schooling, shape, sort, subtraction, teaching, ten, tool, toy, vintage, visual, wooden