The law of cavities

In this third book in the 'S.M.A.R.T. Squad' series, best friends Izzy Newton, Allie Einstein, Marie Curie, Charlie Darwin, and Gina Carver set out on a mystery-filled outdoor adventure. Now that Izzy's finally found her voice in public speaking class and become an ice hockey star, she's determined to conquer her 'dizzy-Izzy-ness' in new situations - including caring for her brand-new braces on an outdoor education overnight and her friends' good-natured teasing about her friend Trevor. But the forecast for fun turns cloudy when the girls discover their cabin chaperone is none other than Izzy's tough public-speaking teacher, Ms. Martinez, and their junior counselor is eighth grade mean girl, Maddie Sharpe.