Houghton Mifflin Harcourt Outage History

Houghton Mifflin Harcourt is up right now

Houghton Mifflin Harcourt had 11 outages in the last 2 years totaling 1786h 6m of downtime — averaging 0.5 incidents per month.

There were 11 Houghton Mifflin Harcourt outages since July 20, 2025 totaling 1786h 6m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.hmhco.com

Notice May 29, 2026

Ed Login Issue

Detected by Pingoru
May 29, 2026, 02:10 PM UTC
Resolved
Jun 01, 2026, 07:20 PM UTC
Duration
3d 5h
Affected: Login
Timeline · 5 updates
  1. investigating May 29, 2026, 02:10 PM UTC

    We are investigating an issue impacting access to the Ed platform, including blank pages after login and intermittent session interruptions. Our teams are continuing to investigate and work towards a resolution. This page will be updated as we know more.

  2. monitoring May 29, 2026, 02:42 PM UTC

    Some users experienced issues accessing the Ed platform earlier today. The issue has now stabilized, and users are able to access the platform. Our teams continue to monitor and investigate the system.

  3. monitoring May 29, 2026, 04:59 PM UTC

    The Ed platform remains stable and users continue to access without interruption. We are continuing to closely monitor system performance to ensure stability.

  4. monitoring Jun 01, 2026, 02:37 PM UTC

    We have not observed a recurrence of this issue this morning and services are currently operating as expected. We will continue to monitor closely to ensure stability before marking this incident as resolved. We will provide another update if conditions change.

  5. resolved Jun 01, 2026, 07:20 PM UTC

    This incident has been resolved. We have not observed any further impact, and all services are operating as expected. We will continue to monitor to ensure ongoing stability.

Read the full incident report →

Minor March 10, 2026

Classcraft on Ed

Detected by Pingoru
Mar 10, 2026, 03:07 PM UTC
Resolved
Mar 11, 2026, 04:00 PM UTC
Duration
1d
Affected: Content and Resources
Timeline · 5 updates
  1. investigating Mar 10, 2026, 03:07 PM UTC

    HMH engineering teams are currently investigating an issue where Classcraft is not visible on Ed. Another update will be provided here as soon as more information is available.

  2. investigating Mar 10, 2026, 04:13 PM UTC

    We are continuing to investigate the root cause of Classcraft not displaying on Ed. Thank you for your patience.

  3. identified Mar 10, 2026, 04:42 PM UTC

    The cause of Classcraft not displaying on Ed has been identified and we are currently working on a fix.

  4. monitoring Mar 10, 2026, 05:39 PM UTC

    Thank you again for your patience. A fix has been implemented and Classcraft is now available for impacted users. Out of an abundance of caution, we will be monitoring this incident into the day tomorrow. If you experience any issues accessing Classcraft, please contact HMH Technical Support.

  5. resolved Mar 11, 2026, 04:00 PM UTC

    This incident is now resolved.

Read the full incident report →

Minor February 20, 2026

Content on Waggle

Detected by Pingoru
Feb 20, 2026, 06:59 PM UTC
Resolved
Feb 23, 2026, 03:03 PM UTC
Duration
2d 20h
Affected: Content and Resources
Timeline · 3 updates
  1. investigating Feb 20, 2026, 06:59 PM UTC

    We are currently investigating an issue where some content on Waggle is not loading as expected. Engineering teams are actively engaged. We apologize for the inconvenience and will post another update here as soon as more information is available.

  2. identified Feb 20, 2026, 08:18 PM UTC

    The cause of some content not loading on Waggle has been identified. HMH engineers are currently working on implementing a fix.

  3. resolved Feb 23, 2026, 03:03 PM UTC

    This incident is now resolved.

Read the full incident report →

Minor January 29, 2026

Contact Center: Intermittent Issues

Detected by Pingoru
Jan 29, 2026, 04:10 PM UTC
Resolved
Jan 29, 2026, 08:02 PM UTC
Duration
3h 51m
Affected: Contact Center
Timeline · 3 updates
  1. investigating Jan 29, 2026, 04:10 PM UTC

    We are currently investigating an issue where some incoming calls to HMH Technical Support and Customer Service are being dropped. We’ve engaged with our vendor partner and are working to resolve this issue as soon as possible. If you experience any issues contacting us by phone, please follow this link for alternative support options: https://support.hmhco.com/s/contactsupport. Thank you for your patience and we apologize for any inconvenience.

  2. investigating Jan 29, 2026, 07:35 PM UTC

    We are working diligently with our vendor partner to resolve this issue as soon as possible and will provide additional updates as they become available. Thank you again for your patience.

  3. resolved Jan 29, 2026, 08:02 PM UTC

    The root cause of this incident has been identified and addressed. The incident is now resolved.

Read the full incident report →

Major January 8, 2026

Classes and Content Not Loading on Ed

Detected by Pingoru
Jan 08, 2026, 07:52 PM UTC
Resolved
Jan 12, 2026, 06:49 PM UTC
Duration
3d 22h
Affected: Content and Resources
Timeline · 6 updates
  1. investigating Jan 08, 2026, 07:52 PM UTC

    We are currently investigating an issue where classes and some content are not displaying on Ed. We apologize for the inconvenience and will post another update as soon as more information is available.

  2. monitoring Jan 08, 2026, 08:50 PM UTC

    Classes and content on Ed are now displaying as expected. We are closely monitoring performance and will update this page again tomorrow. Thank you.

  3. investigating Jan 09, 2026, 03:02 PM UTC

    During the monitoring period we've observed some classes and content not displaying as expected. HMH engineers continue to investigate.

  4. monitoring Jan 09, 2026, 05:45 PM UTC

    Thank you for your patience. Action has been taken to resolve the issue. As a result, classes and content are once again loading as expected. We will continue to closely monitor performance on Ed.

  5. monitoring Jan 09, 2026, 10:36 PM UTC

    We are continuing to monitor for any further issues.

  6. resolved Jan 12, 2026, 06:49 PM UTC

    This incident has been resolved.

Read the full incident report →

Major November 10, 2025

Classcraft Service Interruption

Detected by Pingoru
Nov 10, 2025, 04:45 PM UTC
Resolved
Nov 10, 2025, 08:14 PM UTC
Duration
3h 28m
Affected: Content and Resources
Timeline · 3 updates
  1. investigating Nov 10, 2025, 04:45 PM UTC

    We are aware of an interruption impacting access to Classcraft. HMH engineering teams are currently investigating the cause and are working to restore service as quickly as possible. We will post another update as soon as more information is available. Thank you for your patience.

  2. monitoring Nov 10, 2025, 04:58 PM UTC

    Service to Classcraft has been restored. We'll continue to monitor performance for the next few hours before calling this officially resolved. Again, thank you for your patience.

  3. resolved Nov 10, 2025, 08:14 PM UTC

    Since restoring service, HMH teams have been monitoring access to Classcraft and this incident is now resolved.

Read the full incident report →

Minor October 20, 2025

Intermittent Service Degradation due to AWS Outage

Detected by Pingoru
Oct 20, 2025, 04:34 PM UTC
Resolved
Oct 21, 2025, 04:12 PM UTC
Duration
23h 37m
Affected: LoginLoginLoginContent and ResourcesContent and ResourcesContent and Resources
Timeline · 4 updates
  1. monitoring Oct 20, 2025, 04:34 PM UTC

    We are aware of an ongoing disruption to AWS services which could still be impacting some HMH products, such as some content or videos not loading as expected. AWS has indicated they are making progress on resolving the issue and we continue to monitor this event closely.

  2. monitoring Oct 20, 2025, 09:23 PM UTC

    Impacts to some products and services will continue while AWS takes action to resolve the disruption on the impacted zone. We continue to monitor the situation and will provide another update as soon as possible.

  3. monitoring Oct 21, 2025, 12:15 PM UTC

    AWS service interruption has been resolved as of 10.20. HMH will continue to monitor for any residual impact as a result of this interruption.

  4. resolved Oct 21, 2025, 04:12 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice September 19, 2025

Service Interruption on Ed

Detected by Pingoru
Sep 19, 2025, 01:05 PM UTC
Resolved
Sep 19, 2025, 09:11 PM UTC
Duration
8h 6m
Affected: Content and ResourcesAssignments
Timeline · 4 updates
  1. investigating Sep 19, 2025, 01:05 PM UTC

    Please be advised of a possible disruption on Ed. Educators and students may experience content that loads slowly or not at all. Our teams are investigating, and additional updates will be provided here. Thank you for your patience.

  2. identified Sep 19, 2025, 01:41 PM UTC

    Our teams have confirmed some users may experience errors or slowness when loading content, including the Home, Class Overview and Discover tabs. We are working to address this issue as quickly as possible. Thank you for your patience.

  3. monitoring Sep 19, 2025, 02:33 PM UTC

    We have observed recovery for all services on Ed and users should not experience any errors or delays. As a precaution, we will continue monitoring performance closely today.

  4. resolved Sep 19, 2025, 09:11 PM UTC

    After monitoring performance today without any further issues, this incident is resolved. Thank you for your patience.

Read the full incident report →

Notice August 13, 2025

Technical Support Phone Service

Detected by Pingoru
Aug 13, 2025, 08:27 PM UTC
Resolved
Aug 14, 2025, 01:21 PM UTC
Duration
16h 54m
Affected: Rostering
Timeline · 3 updates
  1. identified Aug 13, 2025, 08:26 PM UTC

    Please be aware that the HMH Technical Support phone number (800-323-9239) is currently unavailable. Visit our HMH Support site for additional support options including emailing and chat.

  2. identified Aug 13, 2025, 08:27 PM UTC

    Thank you for your patience.

  3. resolved Aug 14, 2025, 01:21 PM UTC

    This issue has been resolved and the HMH Technical Support phone line is available.

Read the full incident report →