If your Microsoft Classroom is not displaying the correct class title, try the following steps:

1. Check the course title in the course list. Is the title appearing there correctly? If not, contact your course administrator.
2. If the course title appears correctly in the course list, open the Course Settings page and check if the title is correct there.
3. If the title is incorrect, update it on the Course Settings page.
4. Verify the changes on the Home and Class Notebook tabs.
5. If the title still does not display correctly, verify if the update appears on the course page on the Office 365 portal.