Abstract
A Spatial Reasoning Mathematics Program (SRMP) was implemented over 20 weeks with 28 mathematically-able 4th-graders as the second phase of a classroom design study. The SRMP embedded transformation skills in 28 interrelated mathematical tasks comprising 2-D/3-D relationships, geometric growing patterns and sequences, directionality, area and perimeter, and perspective-taking. Improved spatial reasoning was found across the Pattern and Structure Assessment-Early Mathematics (PASA-2), and the Pattern and Structure Assessment–Spatial (PASA-Sp) measures at post-SRMP. We observed ‘Spatial-Mathematical Connectivity’ (SMC) as bi-directional: spatial reasoning and conceptual understanding proved complementary.