You should ask for the name of the apps used on the related course to each course responsible.
Google Course Builder isn't a Web App. It's software and guidelines that could be used to create online courses which in turn could work as web apps. Each course could include one or several components that requires user authorization but the name of each component depend on each organization or even individuals behind each course / component.
Registration permission request
The following screen shot is shown to me after I clicked on the Registration link on Data Mining with WEKA
Course Builder is an Open Source (Apache 2.0), online education
platform. Use it to create your online course whether it's for an
entire university offering, professional training, or a corporate
OAuth consent screen details
When your site requires access to private data (such as a file on
Google Drive), the owner of the account will be asked to consent to
the access. To prepare the consent screen to ask for access, you must
provide a product name and an email address.
Click the OAuth consent screen tab.
Fill out the fields:
For Email address, select one of the valid addresses.
For Product name show to users, enter the name of your course or site.
Considering ignoring the other fields, which are optional.