The digital educational environment in the context of martial law in Ukraine ensures continuous self-development and self-realisation of an active and creative student through the organisation and functioning of educational systems with openness, integrity and adaptability through educational websites. The authors of the article analyse some mathematical websites and present their own, developed on the basis of the WordPress content management system, which has a dynamic structure: e-lectures, e-workshop, workbooks, files with information for students, work programmes and/or syllabuses, author’s textbooks in mathematical disciplines, workshops, etc. The use of the site in the educational process allows us to state that it provides students with an effective tool for learning mathematics in an interactive and adaptive environment, and the presentation of educational material in text format and video lectures is appropriate for our country, given the unstable Internet connection in some regions and the constant problems with Ukraine’s energy infrastructure due to martial law. The article investigates the opinion and experience of bachelor students regarding the use of specialised websites for studying mathematical disciplines, and provides a correlation analysis of the results of the questionnaire and academic.