Leander ISD Educational Excellence Foundation Share: Education/ TutoringNon-Profit & Community Organizations Leander ISD Educational Excellence Foundation Visit Website P.O. Box 218 Leander, TX 78646 (512) 570-0027 About About LEEF is a 501(c)(3) nonprofit dedicated to providing resources that support innovation, enrichment and equity in pursuit of academic excellence within the Leander Independent School District.