Lunch Lady and the Mutant Mathletes (Lunch Lady #7) by Jarrett J. Krosoczka
From the author of National Book Award finalist Hey, Kiddo.
The Breakfast Bunch have joined the mathletes team, and are all set to win the championship trophy for Thompson Brook Elementary School—they only need to beat the defending champs from Willowby Academy. But Lunch Lady notices something strange about the opposing matheletes and their sinister coach. Will she and her sidekick Betty be able to sort out the suspicious competitors before they snatch victory away from the Breakfast Bunch?
For Ages 7-9