This study investigates the progression of students' meaning-making of epigenetic phenomena while discussing multiple visual representations depicted at different levels of biological organization. Semi-structured focus group sessions involving ninth-grade students (aged 15-16) from a Swedish lower secondary school were video recorded. Students'…

This three-year study aimed to investigate students' experiences with alternative seating practices (ASP) in a public-school string orchestra program. Whereas education scholarship has long demonstrated that democratic classroom seating arrangements play a crucial role in the learning process, typical orchestra classrooms maintain a hierarchical…

Statistical literacy increasingly is considered an important outcome of schooling. There is little information, however, about appropriate expectations of students at different stages of schooling. Some progress towards this goal was made by Watson and Callingham (2005), who identified an empirical 6-level hierarchy of statistical literacy and the…

Teacher professional learning plays a critical role in education reform by enabling teachers to refine their professional skills and keep up with changing content knowledge, pedagogy, and trends in schooling. This study examines how and under what conditions principal instructional leadership contributes to teachers' professional learning in…

The present study tested the possibility of operationalizing levels of knowledge acquisition based on Vygotsky's theory of cognitive growth. An assessment tool (SAM-Math) was developed to capture a hypothesized hierarchical structure of mathematical knowledge consisting of procedural, conceptual, and functional levels. In Study 1, SAM-Math was…

This dissertation tests a dynamic assessment-based cognitive hierarchy model and attempts to identify mathematical concepts that predict student learning potential on more advanced mathematical concepts using the units from ST Math, a self-paced curriculum, for third, fourth, and fifth grade students. The quantitative analyses compared a…

Many latent traits in the human sciences have a hierarchical structure. This study aimed to develop a new class of higher order item response theory models for hierarchical latent traits that are flexible in accommodating both dichotomous and polytomous items, to estimate both item and person parameters jointly, to allow users to specify…

The struggles and often compelling social dramas of middle school may be either long-forgotten or intentionally blocked by adulthood, but many middle schoolers could benefit from guidance during this difficult period of their lives. This article presents the rationale, along with the basic contours, of a six-session program that has been developed…

Effective schools should be superior in both enhancing students' achievement levels and reducing the gap between high- and low-achieving students in the school. However, the focus has been placed mainly on schools' achievement levels in most school effect studies. In this article, we attend to the school-specific achievement dispersion as well as…