The convention had been scheduled for next Thursday and Friday in Atlantic City.
New Jersey Education Association President Barbara Keshishian (keh-SHEESH'-shee-in) says the decision to cancel was made because of the statewide impact of the unprecedented storm.
Atlantic City sustained substantial damage from Sandy. The city's casinos remain closed even though they say their damage was minimal.
The union is looking for ways that its members can contribute to Atlantic City's cleanup and recovery.
Tens of thousands typically attend the annual gathering.
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