This is the first article to appear in a new section in the Arithmetic Teacher called “Promising Research, Programs, and Projects.” This new section will give teachers a view of research, actions, and projects that will affect teaching and learning mathematics at the K–8 levels. Readers of the Arithmetic Teacher are encouraged to submit suggestions or short articles for this section. Of particular interest are projects with developed materials or papers, which the project director will send to readers. (Write to Carole Lacampagne, United States Department of Education, OERI, 555 New Jersey Avenue, N.W., Washington, DC 20208, for article guidelines.)