Güllü, Natalie, https://orcid.org/0009-0001-8884-6734Gerlach, David, https://orcid.org/0000-0003-1112-98812025-07-172025-07-172025https://publicdata.fdm.uni-wuppertal.de/handle/123456789/64Quality Control Report – PDF Compatibility tested with Adobe Acrobat Reader (version 25.001.20566, July 2025): A quality check was conducted to verify the integrity, readability, and usability of the PDF file in the current version of Adobe Acrobat Reader. The file opens successfully without any corruption or error messages, and all pages display correctly. The text content is clear and correctly encoded, allowing for copy, paste, and keyword search without issues. Embedded text appears selectable, indicating that OCR has been applied where necessary. The document structure is linear, consisting of multiple group discussion transcripts, but there are no internal bookmarks or a clickable table of contents. There are no font display issues and no unexpected blank pages.The data set consists of ten transcripts of ten group discussions conducted with participants of a seminar on „Racism in English as a Foreign Language (EFL) teaching" in the English and American Studies programme at a university in Germany. The seminar combined theoretical inputs on critical anti-racism with practical phases of critically analysing textbooks. The participants were both Bachelor's and Master's students aiming to become teachers of English. Five group discussions took place before the seminar (pre-discussions), and five were conducted 5 weeks into the seminar (post-discussions). The pre-discussions lasted between 16:21 and 17:44 minutes and the post-discussions lasted between 10:17 and 14:01 minutes. The impulses for the group discussion, on the basis of which the students exchange ideas, are two different, unrelated textbook pages on the topic „USA" at both times. The participants were not assigned to fixed groups and their identity was not tracked between the two points in time. The students are labelled consecutively from the first pre-discussion to the last post-discussion (S1 - S36), so that a student has two different labels in pre and post. There were different group compositions at both times.deAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/critical awarenesslanguage teacher educationanti-racismgroup discussionscritical pedagogyprofessional development400 Language, linguistics400 Language, linguistics::420 EnglishDataset