for Third Grade Mix-Up by Michele Jakubowski and Luisa Montalto
"When Sidney Fletcher moves to Oak Grove, things get a little strange for Sydney Greene. Not only does Sydney share a name with a boy, but he's in her third-grade class! From first-day-of-school problems to Halloween drama, Sidney and Sydney quickly become friends. Who says boys and girls can't get along? "
Publisher description retrieved from Google Books.