This intermediate resource book can be used to teach problem-solving skills and the language of mathematics using the geoboard. Lessons include clear directions and step-by-step procedures to investigate and build geometric shapes. Reproducible student worksheets are included with each lesson.

Topics include: slides, flips & turns; lines of symmetry; line segments; parallel line segments; right, acute, & obtuse angles; ploygons; diagonals; triangles; quadrilaterals; perimeter & area; and fractions.

It does not include a geoboard.