As per the recent announcement by the Chancellery of the Prime Minister, online classes are prolonged until 26 April.
source: https://www.gov.pl/web/coronavirus/temporary-limitations –
“16. REMOTE TEACHING – ONLINE LESSONS
Restriction applies to: classes in schools and universities
Recommendations: All schools and universities in Poland are closed. Lessons and classes are not held on the premises, but via the Internet using e-learning platforms. Remote lessons are carried out according to the specified rules. At www.gov.pl/zdalnelekcje, teachers and students can find teaching materials consistent with the current core curriculum.
Valid until: April 26, 2020″.