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@CONCORD is published three times a year by The Concord Consortium, a not-for-profit educational research and development organization dedicated to educational innovation through creative technologies.

Copyright © 1998 by The Concord Consortium. All rights reserved. This publication may be reproduced for noncommercial uses without written permission, provided appropriate acknowledgment of the Concord Consortium accompanies the reproduction.

The projects described in @CONCORD are supported by grants from the National Science Foundation REC-9553639, REC-9896075, REC-9725524, REC-9554198, ESI-9896068, ESI-9554162 and CDA-9720384, and the U.S. Department of Education R303A60571 and R303A70182.

We also receive donations from corporations and individuals. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funding agencies. Mention of trade names, commercial products or organizations does not imply endorsement.