Research Foundation of City University of New York
Project DELTA was a collaboration involving City University of New York, the Freudenthal Institute, and Horizon Research, Inc. Project DELTA extended an existing library of 17 interactive CD-ROM digital learning environments on numbers and operations by adding an algebra strand. Each of the digital environments features classroom sessions allowed for exploration of a mathematics topic, children learning over time, and teachers’ instructional techniques. HRI led the project’s research on the impact of the new algebra materials on teacher development.