WATCH THIS: Check out this video from the Institute @ CESA #1 on how to build a Personalized Learning Environment. The 16-minute gem weaves together thoughts, reflections, and opinions from students, teachers and a parent at Walker Elementary School in the West Allis-West Milwaukee School District. The Cooperative Educational Service Agency (CESA) is a network of 12 regions in Wisconsin state that leverages available resources to create learning opportunities for students and teachers in effective member districts. CESA #1 covers 45 public school districts.