I am in Year 8 at Woodland School

I am in Year 8 at Woodland School i am in year 7 at walker school是什么意思? I am in Year 7 at Walker School前面为什么用in而后面用at? I am in Year 7 at walker I am study in Grade 8 at PingHu Middle School I am in my （） year in this middle school 请问“I am in my first year at college.". I am in school和I am at school有什么不同 i am in school "I am in Form One at Walker School,"什么意思 I am at school 还是 I am at a school He is at university in London.I’m in year 7 at YU School.She