Millicent Min: Girl Genius

Blurb

Millicent Min, Girl Genius is a 2003 children's novel by Lisa Yee. The author's first published book, it is about a girl genius named Millicent Min who attends high school in the fictional town of Rancho Rosetta, California. This young girl has a lot of trouble in her social circle. She is an 11-year-old genius but she has no friends. To make things worse, she has to go play for volleyball. She also has to tutor her arch enemy Stanford Wong who almost flunked sixth grade. Then Millicent meets nice Emily Ebers, a fellow volleyball victim, but thinks that to become her friend she has to hide the fact that she is smart. The rest of the novel is spent with Millicent trying to keep her secret from Emily while also having to deal with other problems such as her Grandmother Maddie moving away and having to deal with Stanford especially when he finds out about Emily and becomes her friend as well.
In the companion books, Stanford Wong Flunks Big-Time and So Totally Emily Ebers, this situation is shown from the other children's points of view.