Kelsey Kline is the best reader in the third grade—well, maybe tied for best with know-it-all Simon Ellis. When the principal Mr. Boone announces a school-wide reading contest, complete with a pizza party for the winning class and a special certificate for the top readers in each grade, she knows she's just the person to lead Mrs. Molina's third graders to victory. But how can they win when her classmate Cody Harmon doesn't want to read anything, and even Kelsey's best friends Annika and Izzy don't live up to her expectations? And could Simon possibly be reading all of those books that he claims he is, or is he lying to steal Kelsey's rightful spot at the top?

Annika Riz loves math more than anything. She's trying to teach her dog, Prime, to count. She's determined to beat fellow math whiz Simon Ellis in a Sudoku contest at the public library. She even sleeps under number-patterned sheets. But Annika's best friends Kelsey and Izzy think math is boring. All they care about is the upcoming school carnival: their principal is going to be dunked in a dunking tank and their class is going to have a booth selling home-baked cookies. But then disaster foils the friends' cookie-baking plans. Can math save the day?

Izzy Barr is the star athlete of the third she hits homeruns on her softball team and is one of the fastest runners in her class. But at home, her half-brother, Dustin, seems to be her father's favorite athlete―why else would her dad go to all of his games and miss so many of hers? Izzy pretends that she doesn't care, but as she, her friends Annika Riz and Kelsey Green, and the rest of their class are gearing up for class field day, she can't help but hope her dad will be there to cheer her on in the big race against her rival, Skipper Tipton. Dad doesn't make it to field day, but when he realizes how important it is to Izzy, he and all of her friends and family are there to watch her participate in the citywide 10K run.

The students in Miss Molina's third grade class are abuzz with excitement about the upcoming spelling bee, where they will be competing against the two other classes in third grade. Simon Ellis, who just happens to be good at a lot of other things, is also very good at spelling. But Simon's best friend, Jackson, tells him that it's getting boring losing to Simon all the time. Simon is stuck in an impossible Jackson will be mad whether he spells all the words correctly for their team or if he makes a mistake on purpose and causes his team to miss out on the all-you-can-eat pie buffet. Simon's competitive spirit takes over until he realizes that sometimes the best way to win is to take a chance and let other people shine.

"Cody Harmon loves animals—he even has nine pets—so when the school holds a pet show fundraiser, it should be his time to shine"—