It's not really about school life but there's this manga I enjoyed reading about a rich kid becoming friends with the poor kid who lived next to him and then they grow up and fall in love with each other~
http://www.mangago.me/read-manga/mad_cinderella/
Sorry if this doesn't satisfy your requisites but it was the first one I thought about xD
Thank you it seems interesting will check it out!
I want to read a school life rich x poor, preferably the Uke is the rich one like this one :
http://www.mangago.me/read-manga/uchi_no_ouji_irimasen_ka/
Seme is rich is cool too, doesn't have to be rich x poor you know just different social level
like that one
http://www.mangago.me/read-manga/saa_koi_ni_ochitamae/
http://www.mangago.me/read-manga/selfish_love/