There are severly a lot of differences in the book and the movie. The book has more details however because, well, they couldn’t fit all that useless junk in the movie. First of all, they didn’t show how Scout’s class was (for the 3 grades), Scout didn’t find chewing gum on the tree hole, Ms. Maudies’ house didn’t get on fire, Ms. Dubose didn’t die, (Part two) Jem isn’t a mister, Jem and Scout didn’t go to Calpurnia’s church, Dill didn’t hide under Scout’s bed, Aunt Alexandra doesn’t come to Scout’s house, there aren’t afternoon parties with friends, Atticus stays near the jail and doesn’t go home, and finally: there was no roly-poly in the house. That’s all i can remember, sadly. but hey, no one can remember all the lines in the book.