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Customer Service

1-800-221-5175 (9 a.m.– 6 p.m. EST, M–F)

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International Distributors

Tech Support

1-800-264-8060 (9 a.m.– 8 p.m. EST, M–F)
For Vocabulary Workshop and Common Core Progress English Language Arts and Mathematics:
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Mailing Address

William H. Sadlier, Inc.
Atten: Customer Service
9 Pine Street
New York, NY 10005-4700

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