PLE stands for "Personalized Learning Environment." In a PLE, the ultimate goal is for each and every student to consistently receive personalized and differentiated instruction. Hallmarks of a PLE include but are not limited to student voice and choice in instructional methods, assessment methods and criteria, lesson design and pacing, and learning environment.
STC stands for "School Technology Challenge." School Technology Challenge sites are 1:1 environments that strive to use technology in a variety of ways to transform student engagement through collaboration, constructive learning, student-directed goals, active participation, and authentic tasks.