PiNET is building a support structure for preservice teachers, new teachers in their first or second year of teaching, and experienced teacher-leaders at the K—3 grade level. During the three years of the project, PiNET is working with teachers in the Berkeley and Hayward Unified School Districts, and with UC Berkeley’s Developmental Teacher Education Program (DTE). Teams of teachers participate in an array of professional development activities ranging from attending a mathematics conference to an intensive, introductory two-week summer institute.The principal investigator isPaul Ammon.The coordinators are Linda Lipner and Paul Giganti of the Lawrence Hall of Science. For more information, contact Linda Lipner at 642-0193, or llipner@uclink4.berkeley.edu.