Distance learning in basic and upper secondary schools in the Czech Republic (abridged version for international audience) Thematic report Tomáš Pavlas Dana Pražáková Tomáš Zatloukal Ondřej Andrys Jiří Novosák Roman Folwarczný Irena Borkovcová Zdeněk Modráček Karolína Chovancová Josef Basl Simona Boudová