STEPPING STONE SCHOOL: 512-259-3459; 225 Block House Dr, Leander, TX 78641. Off 1431. steppingstoneschool.com/campus-locations/stepping-stone-school-10 STERLING CLASSICAL SCHOOL: 512-259-2722; 12800 Angel Side Dr, Leander, TX 78641. sterlingclassicalschool.com. Classical Christian-based ...