basicaly, "-로" and "-에" has same meaning but usage is little different "-로" is for direction and "-에" is for place so in that case, school is could ne direction and place both so you can use "-로" and "-에" in most of case when you describe about only directions, then you have to use only "-로" like "to east, to west, to north, to south, to downstairs, to upstairs, etc" but if you are confused about whicn case is for "-로" or "-에", then just don't use "-로" or "-에" in sentence, it's also correct grammar ex) 학교로 간다 = 학교에 간다 = 학교 간다 = going to shcool 공항으로 간다 = 공항에 간다 = 공항 간다 = going to airport but there is exceptions, when you describe "east, west, north, south, left and right, etc", then you have to use "-로" and when you decribe place or direction what has only one syllable, then you can't omit "-로" or "-에" in sentence ex) 산으로 간다(O) = 산에 간다(O) = 산 간다(X) = going to mauntain 강으로 간다(O) = 강에 간다(O) = 강 간다(X) = going to river 위로 간다(O) = 위에 간다(O) = 위 간다(X) = going to UP 동쪽으로 간다(O) = 동쪽에 간다(X) = 동쪽 간다(X) = going to east

They are both correct. a place + 로 is used for the direction or path. a place + 에 is used for the destination. ex) 그는 학교로 갔어요. He went to school but I'm not sure he arrived at school or not. 그는 학교에 갔어요. He went to school and I'm sure he arrived at school.

俩种都是对的 집으로 指的是方向 我要往家走 집에 指的是地点我要回家

thank you ~

I think in most circumstances they would both be correct and it's more a difference in 'feel' than meaning. http://www.koreanclass101.com/forum/viewtopic.php?t=1694