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Provider of K-12 adaptive learning solutions and integrated curriculum.
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Is Houghton Mifflin Harcourt down?
Degraded performance
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Official status checked
Houghton Mifflin Harcourt is experiencing issues
Official provider statusOfficial incident active
ED Assignment Issues — We have identified the cause and implemented measures to prevent further occurrences. Our teams are working urgently to restore assignment functionality for users who are already impacted.
Official provider status0 individual report entries in the last 24 hours. This list includes legacy imports; external source aggregates are shown in the chart.
Official status observations, not measured service uptime.
Official incidents, early warnings and community reports are identified separately. Early warning history covers only the last 24 hours. Dates use your time zone.
| Incident name | Duration | StartedUTC | Acknowledged | Severity |
|---|---|---|---|---|
| 4h 58mOngoing | Yes | Minor | ||
| 77h 10m | Yes | Unknown | ||
| 24h 54m | Yes | Minor | ||
| 68h 4m | Yes | Minor | ||
| 3h 52m | Yes | Minor | ||
| 94h 58m | Yes | Major | ||
| 3h 29m | Yes | Major | ||
| 23h 38m | Yes | Minor |
Uptimus monitors Houghton Mifflin Harcourt through its official status source and normalizes published incidents, maintenance windows and component health into one consistent service status.
This page currently includes 19 monitored components, 24 indexed incidents, 15 maintenance windows and 7 days of known history.
Uptimus is an independent monitoring service and is not affiliated with Houghton Mifflin Harcourt. A healthy status does not guarantee that every user, device or region is unaffected.
Get notified when Houghton Mifflin Harcourt or one of its monitored components reports a major outage or another critical service disruption. Alerts can be routed through the notification channels enabled for your workspace, including email, push and configured integrations. The available history contains 24 indexed incidents, giving each alert context beyond the current status. A recent indexed incident was “ED Assignment Issues”.
Get notified about degraded performance, partial impact and smaller incidents that do not represent a complete outage. Uptimus currently tracks 19 Houghton Mifflin Harcourt components: Login, Login, Login, Content and Resources. Alerts can be routed through the notification channels enabled for your workspace, including email, push and configured integrations.
Planned work published by the official provider.
The scheduled maintenance has been completed.
Started Oct 17, 2026, 01:30 AM UTC · Resolved Oct 18, 2026, 02:30 PM UTC
The scheduled maintenance has been completed.
Started Oct 10, 2026, 01:00 AM UTC · Resolved Oct 11, 2026, 02:00 PM UTC
The scheduled maintenance has been completed.
Started Oct 3, 2026, 01:30 AM UTC · Resolved Oct 4, 2026, 02:30 PM UTC
The scheduled maintenance has been completed.
Started Sep 27, 2026, 01:30 AM UTC · Resolved Sep 27, 2026, 01:30 PM UTC
The scheduled maintenance has been completed.
Started Aug 17, 2025, 05:00 PM UTC · Resolved Aug 17, 2025, 06:00 PM UTC
The scheduled maintenance has been completed.
Started Aug 9, 2025, 01:00 AM UTC · Resolved Aug 10, 2025, 10:00 PM UTC
The scheduled maintenance has been completed.
Started Jul 23, 2025, 02:30 AM UTC · Resolved Jul 30, 2025, 07:30 AM UTC
The scheduled maintenance has been completed.
Started Jul 15, 2025, 04:07 PM UTC · Resolved Jul 16, 2025, 09:00 PM UTC
Downdetector public pages are led by user reports. Uptimus combines community activity with official provider incidents, maintenance windows and component health when the source publishes them.
| Comparison criteria | Uptimus | Downdetector |
|---|---|---|
| Community outage reports for Houghton Mifflin Harcourt | Included | Included |
| Adaptive baseline that separates isolated reports from wider disruption | Included | Included |
| 24-hour report activity and regional outage view | Included | Included |
| One workspace for websites, provider status pages, Steam games and Android apps and games | Included | Separate product |
| Email, push and webhook alerts from the same workspace | Included | Separate product |
| Official incident updates and status timeline for Houghton Mifflin Harcourt | Included | User-report led |
| Component health and maintenance windows kept separate | Included | Limited on public pages |
The official status page for Houghton Mifflin Harcourt reports degraded performance. An unresolved official incident is listed: “ED Assignment Issues”. Components reported as affected: Assignments, HMH Ed. 0 reports were recorded for Houghton Mifflin Harcourt in the last 24 hours. Last official check: .
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