作者的書籍：Richard MacCabe - BookPine

Circles

Circles

Sandy Riggs

Polygons

Polygons

David L. Stienecker

Patterns

Patterns

David L. Stienecker

Three-Dimensional Shapes

Three-Dimensional Shapes

David L. Stienecker

Rectangles

Rectangles

David L. Stienecker

Triangles

Triangles

Sandy Riggs

Division

David L. Stienecker

Multiplication

David L. Stienecker

Numbers

Numbers

David L. Stienecker

Fractions

Fractions

David L. Stienecker

Addition

David Stienecker

Rockets and Satellites

Francene Sabin

Keep at them, boys; keep at them

Richard MacCabe