why does Jem not want anything to do with scout at school? is his behavior typical of an older child/

Jem didn't want to be bothered or embarrassed by his little sister at school. This is very typical of older siblings.

When we slowed to a walk at the edge of the schoolyard, Jem was careful to explain that during school hours I was not to bother him, I was not to approach him with requests to enact a chapter of Tarzan and the Ant Men, to embarrass him with references to his private life, or tag along behind him at recess and noon. I was to stick with the first grade and he would stick with the fifth. In short, I was to leave him alone.

Why does Jemima want nothing to do with scout at school?

no