Using multiple representations and changing between them is at the heart of the mathematics classroom; unconnected changes can, however, be obstructive for students' learning. In order to support students' learning with multiple representations, teachers have to link observed situation aspects with relevant professional knowledge, a competence we…

This article describes the development and validation of two forms of the Geometry Assessments for Secondary Teachers (GAST), which were designed to assess teachers' knowledge for teaching geometry. Both forms were developed by teams of mathematicians, mathematics educators, psychometricians, and secondary classroom geometry teachers. Predictive…

This article reports on some findings from the project "Analysing the Transition from Secondary to Tertiary Education in Mathematics". One of the key variables in the school to university transition is the teacher/lecturer, and here, we deal with the data analysing secondary teachers' and tertiary lecturers' responses to four mathematics…

The passage of Public Law 94-142 (the Education of All Handicapped Children Act) in 1975 established the rights of children with disabilities to a public school education in the least restrictive environment. Fifteen years later, it was amended and renamed the Individuals with Disabilities Education Act (IDEA) (PL 101-476, 1990), still intended to…

ICT integration into classroom teaching and learning practices depends on teachers' attitude toward ICT and the extent of their training in the technology. Early research suggests that males have more positive attitudes toward ICT and have more knowledge and skills about technology than females. Contemporary research, however, suggests that…