The primary school attached to the Faculty of Education at Wakayama University has been conducting research on curriculum development and lesson study with the aim for development of “inquiry skills” and “reflectivity” since 2018. This paper introduces and discusses the research on “reflectivity” that has been undertaken since2020 as part of this research, especially the research on self-regulated learning that has been undertaken since 2021 and its results. Through this, the paper will also clarify practical methods for the development and assessment of “the attitudes toward learning”.