I Can't Remeber The Name of This Trilogy

My 5th grade teacher read this trilogy to my class. In the first book a boy (I think his name was Gordon) bullied two girls and ended up moving away due to his abusive father. Train tracks girls walked along

The second book was set during timrfrmae of ww2. Not able to remember anything else..

3rd book Gordon moves back to where he used to live and ended up falling in love with one of the girls he used to bully

Read to me in 2014