elcome to the web site for Intersection, a newsletter published ten times a year by ExxonMobil Foundation and the National Council of Teachers of Mathematics (NCTM). Through its K-5 Mathematics Specialist Program, ExxonMobil Foundation supports projects across the country to improve student learning in mathematics by strengthening teachers' grasp of content, pedagogy and thoughtful assessment. Intersection features stories from and about those projects, and also reports news about research, events, resources and opportunities of interest to mathematics educators. At this web site, visitors may view newsletters from January 1999 to the present. Please direct comments or questions to Jean Ehnebuske, editor.