As 2020 draws to a close, so does this first volume of Mathematics Teacher: "Learning and Teaching PK-12" ("MTLT"). Ascribing to a digital-first philosophy, the articles comprising this first volume included digital assets such as classroom videos, author introductions, and digital applications (e.g., Desmos apps) and addressed…

This article describes the landscape of teaching assistantships (TAships) in the Mathematics Department of a large, public, research institution. First, we present visualized data describing the terrain for all mathematics graduate students. Second, we focus on three specific journeys in that terrain. We employ an autoethnographical research…

Assistive technology supports students with disabilities in a variety of ways, including serving as a means of instruction. Although virtual manipulatives can serve as an assistive technology tool, limited research examines virtual manipulatives in-and-of-themselves to support students with disabilities. This study explored app-based virtual…

Teacher education research is in still in the process of developing a robust set of tools that can measure the key features of coursework and fieldwork. This article focuses on the design of measures of "opportunities to learn" (OTLs) in content method courses that can be used across large populations of candidates at diverse preparation…

Since probability is a new topic at the primary school level in many countries, many primary school teachers may consider themselves not well prepared or may not value the formative role of probability as a topic for their students to learn. Consequently, the assessment of teachers' attitudes using valid and reliable instruments is a preliminary…

This quantitative research aims to analyze the design and implementation of the Web Application on the educational process of the Linear Function (WALF) considering the TPACK (Technological Pedagogical and Content Knowledge) model and data science. The sample consists of 45 students who studied the Basic Math course at a Mexican university during…

This paper examines mathematical meaning-making from a phenomenological perspective and considers how a specific dynamic digital tool can prompt students to disclose the relationships between a function and its antiderivatives. Drawing on case study methodology, we focus on a pair of grade 11 students and analyze how the tool's affordances and the…

This manuscript presents a study in which the new version of the computer-based training programme, The Number Race (NR), was used as an intervention for mathematically low-performing children in grade one (M[subscript age] = 86.46, SD = 3.89). In addition to ordinary teacher instruction in mathematics, the intervention group (n = 29) received NR…

Attempts to scale up instructional interventions confront implementation challenges that mitigate their ultimate impact on teaching and learning. In this article, we argue that learning about adaptation during the design and implementation phases of reform is critical to the development of interventions that can be implemented with integrity at…

A critical role of mathematics teacher education is to equip teachers with understandings and ambitious practices that support effective mathematics teaching for students from diverse backgrounds, specifically connecting to children's mathematical thinking (CMT) and children's linguistic, cultural, and family funds of knowledge (CFoK). Drawing on…

Many secondary students with specific learning disabilities (SLD) struggle with mathematics problem solving. When students with SLD are taught to use effective problem-solving strategies, their ability to solve mathematics word problems improves. The purpose of this article is to provide a guide for secondary teachers to implement self-regulated…

A teacher's attitude towards a subject has a major influence on their learning and subsequent teaching of that subject. This has a knock-on effect on the development of their own students' attitudes. However, despite such importance there has been a dearth of research in this area, particularly in relation to the attitudes of pre-service secondary…

One of the most fundamental strategies in mathematics instruction is practice problems because teachers know that practicing a skill improves performance. At the same time, teachers also know that just because students can correctly answer practice problems does not mean they fully understand the concept or how to apply a formula--especially not…

Measurement instruments of early childhood teachers' mathematical pedagogical content knowledge (MPCK) have to consider the special characteristics of early childhood teaching. Early childhood teaching includes some planned activities but in contrast to learning in school, it is often motivated and generated by situations which unfold…

The aim of this study was to examine 6th-grade students' mathematical abstraction processes related to the concept of variable by using the teaching experiment method and to reveal their learning trajectories in the context of the RBC+C model. A teaching experiment was administered to a class of 29 middle school students for 3 weeks. Observations,…