Erratum

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Science  13 Mar 1987:
Vol. 235, Issue 4794, pp. 1308
DOI: 10.1126/science.235.4794.1308d

Abstract

In the caption for the picture accompanying the article by John Walsh "Teacher certification program under way" (News & Comment, 20 Feb., p. 838), National Science Teachers Association executive director Bill G. Aldridge was incorrectly identified as NSTA president.