Preview versions that contain new API capabilities. Note that a particular version isn't supported indefinitely. See [Classroom API Roadmap](https://developers.google.com/workspace/classroom/reference/roadmap) for more information.

| Enums ||
|---|---|
| `PREVIEW_VERSION_UNSPECIFIED` | No preview version set. The API behavior and capabilities are equivalent to the publicly released v1 version. |
| `V1_20231110_PREVIEW` | The preview version for the Developer Preview Program release of [`Rubrics`](https://developers.google.com/classroom/reference/rest/v1/courses.courseWork.rubrics). `Rubrics` endpoints are now generally available. |
| `V1_20240401_PREVIEW` | The preview version for the Developer Preview Program release of [`GradingPeriodSettings`](https://developers.google.com/classroom/reference/rest/v1/GradingPeriodSettings). `GradingPeriodSettings` endpoints are now generally available. |
| `V1_20240930_PREVIEW` | The preview version for the Developer Preview Program release of the [`userProfiles.checkUserCapability`](https://developers.google.com/classroom/reference/rest/v1/userProfiles/checkUserCapability) method. |
| `V1_20250630_PREVIEW` | The preview version for the Developer Preview Program release of the [`StudentGroups` CRUD endpoints](https://developers.google.com/classroom/reference/rest/v1/courses.studentGroups). |
| `V1_20260316_PREVIEW` | The preview version for the Developer Preview Program release of [Learning Goals](https://developers.google.com/classroom/guides/manage-learning-goals) API features. |