Ka cika wannan magana: Da somawar Yaƙin Duniya na II a shekara ta 1939, aka rufe Makarantar Koyarwa ta Musamman, kuma Grzegorzewska ta soma aiki a matsayin nas a asibitin sojoji da Red Cross na Poland ke kula da shi. Tsakanin 1939 da 1944, ta koyar a Makarantar Musamman mai lamba 177 a Warsaw kuma ta shiga cikin tsarin ilimi na ɓoye. Tana aiki a cikin ƙungiyar juriya ta Poland, ta rarraba makamai da littattafai; ya shiga Żegota, yana ba da taimako "mai daraja" ga yahudawa; kuma ya shiga ɓoye yahudawa don ceton rayukansu. Ta yi aiki a matsayin memba na Ochota na kula da lafiya a lokacin Warsaw Uprising. A lokacin tayar da kayar baya, an lalata gidanta, kuma a ciki, rubuce-rubucen da ba a buga ba na littattafanta guda biyu, kundi na biyu na "Psychology of the Deaf" (), kundi na farko da aka buga a 1930) da kuma "Masanin Malami" (). Bayan
An 'yantar da Poland a 1945, Grzegorzewska ya sake kunna Cibiyar Ilimi ta Musamman, wanda aka lalata a lokacin rikici. Ganin cewa kashi 30% na malamai sun mutu a yaƙin, ta fara shirye-shirye don taimakawa horar da sababbin malamai da sauri. An sake kafa Kungiyar Malaman Poland kuma ta fara bincike don kimanta shirye-shiryen ilimi na yanzu, matsayin zamantakewar tattalin arzikin malamai, da rawar makarantu a cikin al'ummominsu, da sauran batutuwa.