%0 Journal Article %A Ryszard Pawlak %T ON TEACHER EDUCATION AND ON KEY PROBLEMS OF TEACHING MATHEMATICS %J Didactica Mathematicae %D 2019 %P 123 - 134 %V 41 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/dm.v41i0.7029/ %R 10.14708/dm.v41i0.7029 %G pl %F 10_14708_dm_v41i0_7029