发明名称 ASSEMBLY FOR TEACHING MATHEMATICAL CONCEPTS
摘要 An assembly for teaching mathematical concepts includes a plurality of interlocking components, each having at least one connecting end so that the components can be combined in any order or length. Each component is assigned a mathematical value according to its length, and this value may be indicated by indicia on its face or by color coding A base is also provided for retaining the columns of components in vertical formations. Means are provided on the platform of the base for engaging the bottom component in each column.
申请公布号 CA2162944(A1) 申请公布日期 1996.05.17
申请号 CA19952162944 申请日期 1995.11.15
申请人 WOLDENBERG, RICHARD;HOFFMAN, LISA 发明人 WOLDENBERG, RICHARD;HOFFMAN, LISA
分类号 G09B1/06;G09B19/02;(IPC1-7):G09B19/02 主分类号 G09B1/06
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