it represents jem's childhood
When Calpurnia says Jem has the "look arounds," she means he's behaving suspiciously or behaving in a way that suggests he's up to something. It implies that Jem is acting in a sneaky or curious manner.
yes jem is courageous
Boo Radley saves Jem and Scout in Chapter 29 of "To Kill a Mockingbird" when he emerges from his house to defend the children from Bob Ewell's attack. Boo intervenes and ultimately saves Jem and Scout from harm.
When Miss Maudie says that Jem gets more like Jack Finch every day, she is implying that Jem is becoming more mature, responsible, and thoughtful - traits that are characteristic of his Uncle Jack. It suggests that Jem is growing into a respectful and wise young man, similar to his uncle.
Jem's response "In a pig's ear you did" is slang that means disbelief or skepticism, similar to saying "I don't believe you" in a playful or sarcastic way. Jem doesn't think that Dill actually helped engineer the train; he is expressing doubt about Dill's claim.
Dill and Jem see the shadow of Atticus Finch when Jem is on the porch of the house.
he attacks Jem which breaks Jem's arm, then is stabbed, presumably by Jem or Boo Radley, who brings Jem back home
Jem means that its not right that an innocent man gets railroaded by racism.
a camellia flower, like the ones of hers that Jem destroyed earlier. She did that to show Jem that she wasn't as awful of a person as Jem (and Scout) believed she was.
Jem is really Jerrica Benton, disguised by a futuristic holographic projector.
Jem Costello was created in 2010.