Dr. Cordido will discuss recognizing signs of sleep disruption and methods to help children breath optimally while sleeping. After listing to Dr. Cordido, stay for a tour at our Open House from 6pm - 7pm! Guidepost Montessori in Stonebriar is one of the most trusted Montessori schools in Frisco, Texas. Indoors, rooms are spacious, bright, and light-filled, creating a warm and calm space for children to work. Guidepost Montessori at Stonebriar is located in the heart of Frisco, Texas, off of Warren Parkway and Fenwick Drive.