Altogether, One at a Time by E. L. Konigsburg Four short stories about rather selfish kids. One has a birthday party. He is forced to invite a dweeby kid he is ashamed of being around. He would rather hang out with one particular boy with whom he would really like to be friends. The dweeb manages to ruin the party in a manner altogether different from what our narrator had expected. The second story is about a boy who goes to his Grandmother's house and learns to be a little bit less self centered when he and his Grandmother go to see the Leonids. Sent to a fat camp, a third kid learns a little bit about something when she has a strange councilor who comes around only on Friday nights. The last story is by our narrator's mama, who bested a white kid at the school she was bussed to, and still managed to learn a lesson.
Happy reading.