2

A concrete approach to integer addition and subtraction

Year:
1976
Language:
english
File:
PDF, 708 KB
english, 1976
3

Divisibility Tests: So Right for Discoveries

Year:
2002
Language:
english
File:
PDF, 2.15 MB
english, 2002
4

A Conceptual Model for Solving Percent Problems

Year:
1994
Language:
english
File:
PDF, 1.33 MB
english, 1994
5

A Visual Approach to Solving Mixture Problems

Year:
1996
Language:
english
File:
PDF, 1.65 MB
english, 1996
6

Visualizing the Geometric Series

Year:
1989
Language:
english
File:
PDF, 2.37 MB
english, 1989
7

Approximating √x

Year:
1988
Language:
english
File:
PDF, 513 KB
english, 1988
8

Star Patterns

Year:
1978
Language:
english
File:
PDF, 647 KB
english, 1978
13

Fraction Patterns—Visual and Numerical

Year:
1989
Language:
english
File:
PDF, 1.25 MB
english, 1989
14

Visual Thinking and Number Relationships

Year:
1988
Language:
english
File:
PDF, 1.17 MB
english, 1988
16

Difference between cubes

Year:
1988
Language:
english
File:
PDF, 324 KB
english, 1988