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NEW! Holt McDougal Online Feature Release Guide – May 2017 > NEW! ThinkCentral Feature Release Guide – May 2017 > Intervention Product Features & Updates – Mid-June 2017 > Intervention Product Features & Updates – Mid-May 2017 > To sign up for our communications, please call or email the Product Technical Support team. Check out HMH Online Help Center for in-depth support by platform or role.