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K-12 Educational Materials
Hours of Operation 9:00 am to 6:00 pm ET M-F
800.225.5425
800.269.5232
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Intervention Customer Service (MATH 180, READ 180, Reading Inventory, English 3D and more)
Hours of Operation 9:00 am to 6:00 pm ET M-F
Customer Service: 800.225.5425
800-269-5232
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HMH International Publishers
Hours of Operation 9:00 am to 6:00 pm ET M-F
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