The aim of this longitudinal research is to examine the development process of scientific and consistent knowledge structures of first, second, and third-grade students in middle school within the concepts of melting and dissolution according to conceptual change theories at the end of the education and training processes carried out in…

Grade retention, the practice of requiring a student to remain in the same grade the following year, disproportionately affects students with sociodemographic risk and facing academic challenges. Each year, the United States spends $20 billion on retention and two million children are retained. Extant studies examining early elementary grade…

Grade retention, the practice of requiring a student to remain in the same grade the following year, disproportionately affects students with sociodemographic risk and facing academic challenges. Each year, the United States spends $20 billion on retention and two million children are retained. Extant studies examining early elementary grade…

This dissertation reports the results of a qualitative research project on area measurement. The study utilized structured, task-based interviews with students to (a) investigate the ways students enumerate and structure two-dimensional space with a variety of area units; (b) identify conceptual, procedural, and intuitive aspects of area…