## The effectiveness of a variable base abacus for teaching counting in numeration systems other than base ten |

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### Contents

A REVIEW OF THE RELATED LITERATURE | 14 |

THE INSTRUMENTS THE VISUAL AIDS AND | 30 |

CHAPTER PAGE | 36 |

Copyright | |

2 other sections not shown

### Common terms and phrases

11 base abaci adjusted Abacus and student administered analysis of covariance analysis of variance Arithmetic Teacher base 9 base eight Base Four base nine base number base seven Base Three beads chapter Commentary for Teachers correct responses counting in base counting in numeration Davidson County school dots or x's Educational Screen effectiveness Eliakim Hastings Moore experimental groups expressed in base F ratio figure the place Flash Cards Form-B gain scores hypothesis IQ measures Junior High School large abacus Large Variable Base machine counted mathematics curriculum Mathematics Education Mathematics for Junior Mathematics Study Group mean gain Motion Pictures number of correct number of x's Numeration in Base numeration systems Peabody Demonstration School Percy Priest place values positional notation post-test pre-test pupils quantity recorded the number School Mathematics Study special place symbol Table teaching aids three is elected tion Treatment Twelve expressed variable base abacus visual aids x's placed