selected publications
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book
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Step by step fractions. Teacher's guide.
Allen, Tex: DLM Developmental Learning Materials.
1987
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Step by step addition. Teacher's guide.
Allen, Tex: DLM Developmental Learning Materials.
1984
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Step by step multiplication. Teacher's guide.
Allen, Tex: DLM Developmental Learning Materials.
1984
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Step by step subtraction. Teacher's guide.
Allen, Tex: DLM Developmental Learning Materials.
1984
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Step by step fractions. Teacher's guide.
Allen, Tex: DLM Developmental Learning Materials.
1987