Hooway for Wodney Wat by Helen Lester (2002)
Poor Rodney Rat can't pronounce his R's and the other rodents tease him mercilessly. But when Camilla Capybara joins Rodney's class and announces that she is bigger, meaner, and smarter than any of the other rodents, everyone is afraid. It seems she really is bigger, meaner, and smarter than all of the rest of them. Until our unwitting hero, Wodney Wat, catches Camilla out in a game of Simon Says. Read along with Wodney as he surprises himself and his classmates by single-handedly saving the whole class from the big bad bully. Children will delight as shy Rodney Rat triumphs over all and his tiny voice decides the day, R's or no R's.