Morton's "language knowledge for content teaching" (LKCT) is a powerful tool for understanding interactions in content and language integrated learning (CLIL) classrooms, as well as CLIL teachers' knowledge base and teacher language awareness (TLA). However, often lacking in the body of research on TLA and LKCT is an explicit stance on…

This dissertation case study examines how teachers' levels of units coordination afford their ability to reason multiplicatively and fractionally, as well as use their mathematics knowledge for teaching to analyze student multiplicative and fractional reasoning, when a two-year intervention is put into place to evoke new mathematical reasoning.…

Teacher knowledge, especially of proportional reasoning, is important, particularly in middle school grades in the United States. In this instrumental case study, one teacher's understanding of constant as it relates to proportions and how that understanding shifted over the course of a six hour professional development experience is discussed.…

Much research has been conducted regarding student alternative conceptions in chemistry, and a significant amount of work has focused on the areas of chemical equilibrium and reaction rates. Less research has focused on teachers' alternative conceptions in these areas, and most of this work has studied the conceptions of pre-service and novice…

This paper addresses the continuing need for mathematics teachers to enrich their mathematical knowledge beyond the school curriculum, in order to effectively engage students in creative and imaginative thinking, particularly, but not exclusively, students who show exceptional promise. The author, a retired university professor, works staff and…

This paper describes seven in-service teachers' interpretations of student statements about slope. The teachers interpreted sample student work, conjectured about student contributions, assessed the students' understanding, and positioned the students' statements in the mathematics curriculum. The teachers' responses provide insight into their…

As a result of the increased focus on data literacy and data science across the world, there has been a large demand for professional development in statistics. However, exactly how these professional development opportunities should be structured remains an open question. The purpose of this paper is to describe the first iteration of a design…

The paper reports an investigation into how a group of elementary and middle school teachers collectively attempted to solve and understand a fraction division problem using an area model. Solving the word problem required that teachers determine how many two-thirds fit into three-fourths. The teachers struggled to conceptualise fraction division,…

This study reports teachers' insights and challenges after one year of adopting a curricular material designed to move students through carefully engineered, small steps and encourage learners through success and accessible challenges. The analysis of interviews showed that teachers 'followed' the material in different ways, not necessary in-line…

This article presents a study regarding preschool teachers' skills and competencies in teaching science and mathematics. The aim of the project was twofold; one to find out the preschool teachers' knowledge about mathematics and science concepts and then to develop support material to empower them with skills and competencies to teach these…

This study explores in-service teachers' attitudes and knowledge about a pressing environmental issue, "global climate change" (GCC), and how these may relate to their classroom teaching. In this work, nineteen teachers from Native American communities attended a professional development workshop that focused on enhancing their…

There is a growing awareness that an engineering presence within the K-12 curriculum provides an authentic contextual base for mathematics and science concepts. One large scale initiative focused on pre-college engineering is the National Center for Engineering and Technology Education (NCETE) funded through the National Science Foundations' (NSF)…

Effective professional development engages, rather than bypasses, teacher thinking. This article describes strategies to heighten teachers' awareness of the difference between procedural knowledge and conceptual understanding. (Contains 6 figures.)

This case study explores the ways in which a beginning elementary classroom teacher gains a foothold in teaching science. The analysis includes episodes from the teacher's first three years of teaching while participating in an educational research project that investigated an inquiry-based approach to teacher professional development. The…

This study has two parallel research agenda: (1) the development of social skills and pedagogical content knowledge in teacher candidates as they work collaboratively in pairs, and (2) the development of conceptual understanding and social skills in elementary school students who are taught by teacher candidates with cooperative learning…