This study aims to demonstrate a detailed knowledge map of teacher assessment research via a 10-year data set from the Web of Science (WoS) database. A bibliometric analysis was employed for analyzing the articles published between 2012 and 2021 to show the status of teacher assessment research in the past ten years, research topics on teacher assessment, and future research directions. Using the keyword "teacher assessment and teacher evaluation" and filtering data by selecting articles and early access in teaching and education, 847 articles were retrieved. Through production, content, and citation analysis with the help of a bibliometric tool, this article present an overall knoeledge map about teacher assessment reserach, and We found that teacher assessment remained a popular research theme in the academic field over the past ten years, and its booming production involved many authors, institutions, and sources, and countries. Furthermore, "assessment," "formative assessment," "teacher education," and "students," "knowledge," "education," and "performance" are popular topics in teacher assessment research, and fundamental issues, including "impact," "accountability," "feedback," "technology," "formative assessment," "knowledge," and "achievement" keep good topics to be explored in future research. In the end, we argue that more detailed analysis on spectfic topics on teacher assessment by integrating quantitative and qualitative methods.

Keywords: ten-year development, teacher assessment, teacher evaluation, bibliometric analysis