AUTHOR=Christiansen Iben Maj , Marschall Gosia , Corriveau Claudia TITLE=Editorial: Theories and theorising in mathematics education and how they inform teacher education JOURNAL=Frontiers in Education VOLUME=8 YEAR=2023 URL=https://www.frontiersin.org/journals/education/articles/10.3389/feduc.2023.1298455 DOI=10.3389/feduc.2023.1298455 ISSN=2504-284X