00967nam a2200253 i 450099100047984970753620020506130935.0981215s1997 fi ||| | eng 9514575911b10706471-39ule_instEXGIL146419ExLBiblioteca InterfacoltàitaPehkonen, Erkki454837Use of open-ended problems in mathematics classroom /ed. Erkki PehkonenHelsinki :University, Department of teacher education,1997130 p. ;21 cm.Research Report ;176Matematica - Insegnamento.b1070647123-02-1728-06-02991000479849707536LE002 Ped. II C 1812002000490421le002-E0.00-l- 00000.i1080203428-06-02Use of open-ended problems in mathematics classroom909142UNISALENTOle00201-01-98ma -engfi 01