This study focuses on how the combined use of graphic calculators with connectivity software promotes the social construction of mathematical knowledge. Particular emphasis is placed on the aspects related to design, development, implementation, and evaluation of didactic activities that integrate these technologies. We use Didactical Engineering…

In this study we investigated eighth grade students' informal justification for the circle area formula to expand accounts of the measurement knowledge for middle-school age students. Data were collected during three paired interviews of a three-year teaching experiment. Here we describe schemes students exhibited as they operated on measurement…

Research has shown that how principles and tools related to Assessment for Learning (AfL) are taken up by teachers can significantly impact how assessment initiatives are realised. However, questions remain about how teachers develop new resources for use in local contexts, and what these processes entail. This article examines such processes in…

Background: Asthma places a heavy burden on Chicago's schoolchildren, particularly in low-income, minority communities. Recently, our group developed a 10-week afterschool program, the Student Asthma Research Team (START), which successfully engaged high school youth in a Photovoice investigation of factors impacting their asthma at school and in…

Eight eighth-grade students identified as having emotional and/or behavioral disabilities participated in a multiple-baseline design study to assess the effects of teaching persuasive writing and applying writing in the civics content area. After baseline data were collected, two intervention phases were implemented. An instructional phase on…

The 12th iteration of the International Conference on Educational Data Mining (EDM 2019) is organized under the auspices of the International Educational Data Mining Society in Montreal, Canada. The theme of this year's conference is EDM in Open-Ended Domains. As EDM has matured it has increasingly been applied to open-ended and ill-defined tasks…