Houghton Mifflin Harcourt outage history

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.

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.

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

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.

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.

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.

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

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

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.

This incident is now resolved.

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.

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

This incident is now resolved.

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.

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.

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

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.

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

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

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.

We are continuing to monitor for any further issues.

This incident has been resolved.

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.

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.

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

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.

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.

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.

This incident has been resolved.

Please be advised that some teachers in Ed may experience a delay in the ability to manually score an assessment item. No data has been lost, only the ability to manually score by the teacher has been delayed. We are investigating the issue and updates will be provided here when more information is available.

We have identified an issue impacting manual scoring. Some completed assessments are delayed, and teachers are unable to manually score items. We are working to address this issue as quickly as possible.

Our teams continue working to address the delays for manual scoring as our top priority. Thank you for your continued patience.

We continue working to address the delays for manual scoring and expect to provide an update tomorrow morning at 9:00AM ET.

We continue working to address the delays for manual scoring and will provide another update once more information is available.

HMH Engineering teams continue to restore delayed assessments and as this work continues, impacted assessments will be available for scoring on Ed. If an assessment is not yet visible on Ed, please check again later. And as a reminder, there is no loss of assessment data. We will provide a daily update on this page until the issue is resolved.

Processing of impacted assessments continues successfully and as they are processed will appear on Ed. Thank you for your patience.

Processing of impacted assessments continues successfully and as they are processed will appear on Ed. These activities will continue over the weekend and we will provide another update on Monday.

The incident is resolved. All impacted assessments are now available on Ed. Thank you again for your patience.

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.

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.

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.

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

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.

Thank you for your patience.

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

We have identified an issue impacting rostering for HMH solutions and Administrators are unable to roster. We are working to resolve this issue as quickly as possible, and updates will be provided here when information becomes available. Thank you for your patience during this disruption.

We have restored rostering for some organizations and our teams will continue working to restore all remaining organizations.

Work continues to restore rostering services. If your organization is impacted by this issue a message will display for Administrators when attempting to roster. If you see this message, please delay any rostering activities. If you do not see this message, you are able to roster without any issues.

Our teams are making progress restoring rostering service for all organizations.

Our teams have restored rostering service for the bulk of our users. However, some still remain unable to roster. If your organization is impacted, an alert will display for Administrators communicating that they should not attempt to roster. The next update is planned for Monday morning and we thank you for your patience as we work to restore service.

We continue working to restore rostering service for the remaining group of customers; however most organizations are eligible to roster as of yesterday. If your organization is impacted, an alert will display for Administrators communicating that they should not attempt to roster.

Our teams have made more progress in restoring rostering service, however some organizations remain unable to roster. Addressing this issue is our top priority and we thank you for your patience. If your Administrator receives a message indicating you are unable to roster, please do not attempt to roster. Once rostering service for your organization has been restored, this message will no longer appear.

We continue working to restore rostering service for all customers. If your Administrator receives a platform message indicating you are unable to roster, please do not attempt to roster. Once rostering service for your organization has been restored, this message will no longer appear.

We continue working to restore rostering service for all customers, thank you for your patience. If your Administrator receives a platform message indicating you are unable to roster, please do not attempt to roster. Once rostering service for your organization has been restored, this message will no longer appear.

Our teams have enabled the vast majority of customers to roster. The small remaining who are still unable to roster will see a message when they attempt to roster within the platform and we are working to restore these final customers as quickly as possible. Thank you for your patience as we work to resolve this issue.

Customers may experience delays in rostering today. We are working to address these delays as quickly as possible.

Rostering services are performing normally without delays. Thank you for your patience as we worked to address this issue.

Some customers may experience delays when using the HMH Rostering Service. Our teams are working to address these delays as quickly as possible. If you are attempting to use the HMH Rostering Service today and notice it is taking longer than expected, please allow the process to complete and do not resubmit as this will increase the delay. Thank you for your patience as we work to address this issue.

Some customers may experience delays when using the HMH Rostering Service. Our teams are working to address these delays as quickly as possible.

Our teams have implemented additional options for organizations to roster educators and students. As of this update the majority of organizations can roster successfully. Additionally, we have released changes that have mitigated the delays some administrators experienced last week. Thank you for your patience and your partnership during this issue.

Our teams continue working to enable rostering for a small group of remaining organizations. Some customers may experience errors when attempting to log in after successfully rostering and we are working to address those issues as quickly as possible. Thank you for your continued patience.

All organizations are now able to roster. Some customers may still experience errors when attempting to log in after rostering and we are working to address those issues as quickly as possible.

This incident has been resolved.

Please be advised Holt McDougal Online (My HRW) is experiencing service interruption. We are working to resolve this as soon as possible and additional details will be provided here as soon as possible. Thank you for your patience.

Service has been restored to Holt McDougal Online (My HRW) and users are able to log in and access the platform. As a precaution our team will continue monitoring performance.

Service for Holt McDougal Online (My HRW) is normal this morning and we are monitoring performance today. This platform experienced two outages overnight between 8:29PM ET – 10:29PM ET and 3:10AM ET – 4:44AM ET. During this time Administrators, Teachers and Students were unable to log in. Thank you for your patience as we worked to restore service.

Service for Holt McDougal Online (My HRW) has remained normal today with no further issues. As a precaution we will continue monitoring performance for the rest of the day.

Service for Holt McDougal Online (My HRW) has remained normal since yesterday morning at 4:44AM ET. Administrators, Teachers, and Students are able to log in without any issues. As a precaution our teams plan to continue monitoring performance today.

Holt McDougal Online service has continued operating normally since Thursday, May 29, 2025, at 4:44AM ET. After monitoring as a precaution, this incident is resolved.

We are investigating a disruption to the Holt McDougal Online. Administrators, Teachers and Students are unable to log in to the platform. Some users who were already logged in to the platform or use Single Sign On users (SSO) can log in and access the Dashboard, however they are unable to access assignments or manage classes (manual rostering).

Our teams have identified the issue and performance has somewhat recovered. All users are currently able to log in to Holt McDougal Online and access assignments and manage classes. However, users may still experience performance that is slower than expected. Our teams are working to address this as soon as possible. Thank you for your patience.

Holt McDougal Online service has returned to normal, and users should no longer experience any slow performance. As a precaution we will continue monitoring performance today.

Holt McDougal Online service has continued operating normally since 12:47PM ET. This incident is resolved.

Please be advised that we are investigating a possible a service interruption for users attempting to launch Amira from Ed. Additional details will be provided here as soon as possible.

Users are now able to launch Amira from Ed.

Please be advised that we are investigating a possible a service interruption impacting assigned assessments on Ed. No data has been lost, but some users may experience delays in seeing some submitted assessments as "Done". Additional details will be provided here as soon as possible.

Our teams have identified the cause for this issue and are working to resolve it as soon as possible. Core program assessments such as for Into Reading, Into Literature, and Into Math are experiencing a delay in showing as completed or “Done” in the Ed Assignments tab. After a student submits a completed assessment, there is a short delay before it surfaces as Done. In some cases, the assessment returns to the state of “To Do”. No action is needed from either teacher or student as these assessments will change to Done after the delay and no data will be lost. Our team estimates this delay will continue until the end of today, however the time of the delay will incrementally reduce as time passes.

At approximately 3 PM ET all impacted assessments began processing without delay and have continued to process within the expected timeframe of around 5 minutes. As a precaution, our teams have monitored performance and will continue to do so until Monday. Our teams have prepared a solution to address the underlying issue and plan to deploy this after US school hours. We are confident this change will prevent this delay from happening in the future. Thank you for your patience as we work to fully resolve this issue.

MONITORING: HMH teams released a solution on Friday to address delays to assigned assessments. All newly assigned assessments will process without delay. However, some delays to Manual Scoring are expected through the end of day today. Teachers will see a message on screen for any student data that is still processing. Thank you for your patience as we work to fully resolve this issue.

Our teams have continued monitoring performance today and there have been no further delays. This incident has been resolved, and we thank you for your patience as we worked to restore performance.

Please be advised that HMH is investigating a possible a service interruption. Some users may experience slow loading content in Ed. Additional details will be provided here as soon as possible.

Our teams have released a solution and performance has returned to normal as of 9:15AM ET. We will continue monitoring performance for the next hour to confirm there are no further issues.

Our teams have continued monitoring performance in Ed and have observed no further issues. This incident has been resolved, and we thank you for your patience as we worked to restore performance.

Please be advised that some teachers in Ed are experiencing a delay in the ability to manually score an assessment item and are receiving an error message. There is no data loss and all other elements within Ed are operating normally. We are working to address this delay and thank you for your patience.

Our Engineering team has addressed the cause of the delay and are now working to complete a backlog of scoring activities. The delay will incrementally reduce as this backlog is depleted and then return to normal operations. An update will be posted here once this has completed.

All backlogged assessment scoring events have been processed and there is no longer a delay for teachers to manually score items from completed assessments. As a precaution we will continue monitoring performance until we are confident there are no further delays. Thank you for your patience as we worked to restore service.

Manual scoring continues to process without delay this morning and we are confident this issue has been addressed. As a precaution we will continue monitoring performance today to ensure there are no further issues. Thank you for your patience as we worked to restore service.

Our teams have continued monitoring performance for scoring in Ed and there have been no further delays. This incident has been resolved, and we thank you for your patience as we worked to restore performance.

Read 180 is experiencing a service interruption. Teachers and Students are currently unable to launch the software and receive an error message when attempting to do so. HMH teams are investigating this issue now and additional updates will be provided here as soon as possible. Thank you for your patience and we apologize for any inconvenience.

Performance on Read 180 has returned to normal. We will continue monitoring performance and provide additional updates here.

Performance on Read 180 has remained normal. HMH teams have identified what we believe is the root cause of the problem and are working to apply a permanent solution to address this. An update will be provided tomorrow on or before 10:00AM ET.

We have released a solution to address the root cause of this issue. As a precautionary step our teams will continue closely monitoring performance in Read 180 today. An update will be provided here before the end of the day.

This incident has been resolved.

Read 180 is currently experiencing a service degradation impacting students and teachers. The issue is intermittent, with some students receiving an error message when using the software and some teachers receiving an error when attempting to access Read 180 resources and settings. Our teams are working to resolve this issue as soon as possible and updates will be provided here as soon as possible. Thank you for your patience and we apologize for any inconvenience.

Our teams have taken steps to address the issue impacting Read 180. Teachers and Students are now able to use the software without errors. We will continue monitoring performance to ensure there are no further disruptions. Thank you for your patience.

This incident has been resolved.

We have identified an issue impacting some ClassLink Single Sign On (SSO) access to HMH platforms. Our Engineering team has released a solution to resolve this issue and all users should be able to log in successfully. We will continue to monitor for any further issues.

Login access for all impacted ClassLink Single Sign On (SSO) accounts has continued operating normally today and this incident is now resolved. Thank you for your patience during this disruption.