The purpose of this grant is to increase the breadth and depth of the mathematics knowledge of one elementary school teacher who has a demonstrated commitment to mathematics teaching and learning. The applicant must have the support of the school principal in becoming a mathematics teacher-leader within her or his school or district. For the 2006-2007 school year, grants with a maximum of $6,000 each will be awarded. Only one teacher per school may receive the award. The desired outcome of the funded project is the development of an elementary school mathematics teacher with mathematics content expertise. The grant recipient will be expected to provide ongoing professional development to teachers within the school or district to strengthen their mathematical understandings and instructional practices. This professional development must include sustained in-service programs focusing on improving the content knowledge of the elementary teachers within the school or district and working with teachers in their classrooms through demonstration teaching or co-teaching. The applicant will be expected to select, in collaboration with the school principal and other teachers, specific mathematics content aligned with the Content Standards of Principles and Standards for School Mathematics (NCTM 2000) and develop expertise in this mathematics content.