The National Council of Teachers of Mathematics (NCTM) is a professional organization in the United States dedicated to improving mathematics education. Founded in 1920, it provides resources, support, and guidance for teachers, educators, and policymakers to enhance the teaching and learning of mathematics at all levels. NCTM publishes various materials, including journals, books, and curriculum standards, to promote effective teaching practices. The organization also hosts conferences and workshops, fostering collaboration among educators to share innovative strategies and research in mathematics education.