 Pupils sit crammed together without necessary materials , and often without skilled teaching staff . Moreover , the Polish schools are closed during at least five months out of the ten months of the school year due to lack of coal or other fuel . Of twenty @-@ thirty spacious school buildings which Kraków had before 1939 , today the worst two buildings are used ... Every day , pupils have to study in several shifts . Under such circumstances , the school day , which normally lasts five hours , is reduced to one hour . 
 Pupils sit crammed together without necessary materials , and often without skilled teaching staff . Moreover , the Polish schools are closed during at least five months out of the ten months of the school year due to lack of coal or other fuel . Of twenty @-@ thirty spacious school buildings which Kraków had before 1939 , today the worst two buildings are used ... Every day , pupils have to study in several shifts . Under such circumstances , the school day , which normally <a href='uninflect' title='1'><mark>lasts</mark></a> five hours , is reduced to one hour . 
Pupils sit crammed together w/o necessary materials , and often without skilled teachin staff . Moreover , the Polish schools r closed during at least five months outt of the ten months of da skoo year due to lack of coal or other fuel . Of twenty @-@ thirty spacious school buildings which Kraków had b4 1939 , today tdaworst 2 buildings arrsed ... eryday , pupils gotta study in several shifts . Under such circumstances , the school day , which normally last five hrs , is reduced to one hour .