The database contains three files: 1) ALL_INSTRUCTORS_PF_FINAL.csv: it is a file with 275 answers to a survey that was developed in the context of the ODLEP project (Project reference No: 2022-1-EL01-KA220-HED-000089152) and The questionnaire includes one hundred questions, as mentioned earlier and it is divided into four discrete parts: Participants’ Profile Distance Education Experience Learning and Teaching Styles Personality Characteristics 2) ALL_STUDENTS_FINAL_PF_FINAL.csv: Students from six universities participated in the research and 646 responses were collected. The survey that the students answered consists of the following discrete parts: Introductory note on the Specific Research Survey Students’ Attributes Students’ Distance Education Experience Students’ Preferred Learning Styles Fellow Students’ Preferred Learning Styles Preferred teaching style of Instructors as considered by students Students’ Personality (big five personality traits and facets) 3)ODLEP_Knowledge_repository_v2.xlsx: An excel file with two tabs. In the first tab 42 distance HE programs are summarized. The tab contains text that answers the following elements: Country, Program Name, Period that it was active, Characteristics that made it successful, Limiting Factors, Additional Information. In addition, the second tab contains information on 97 scientific papers on the issue of Distance/online education and the parameters that made it successful. The column names are: Title, Authors, Year of Publication, Journal Name, Objective of the paper, Most important Conclusions