Around the world, abacuses have been used in pre-schools and elementary schools as an aid in teaching the numeral system and arithmetic.
ɚɹˈaʊnd ðə wˈɜːld, ˈæbɐkəsᵻz hɐvbɪn jˈuːzd ɪn pɹˈiːskˈuːlz ænd ˌɛlɪmˈɛntɚɹi skˈuːlz æz ɐn ˈeɪd ɪn tˈiːtʃɪŋ ðə nˈuːmɚɹəl sˈɪstəm ænd ɚɹˈɪθmətˌɪk.