> ## Documentation Index
> Fetch the complete documentation index at: https://docs.timeback.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 1EdTech standards

> The interoperability standards that power Timeback

The Timeback APIs are built on **1EdTech standards**. 1EdTech (formerly IMS Global) maintains the most comprehensive set of education interoperability standards.

| Standard      | What it enables                                                       | What you skip building                                     |
| ------------- | --------------------------------------------------------------------- | ---------------------------------------------------------- |
| **OneRoster** | Sync students, classes, and enrollments with school SIS systems       | Identity management, rostering pipelines, enrollment logic |
| **LTI**       | Single sign-on launch from LMS platforms into your app                | OAuth flows, session management, user provisioning         |
| **QTI**       | Interoperable question and assessment formats                         | Custom question schemas, scoring engines, item banks       |
| **Caliper**   | Standardized learning event stream for analytics                      | Event taxonomies, data pipelines, analytics infrastructure |
| **CASE**      | Alignment to academic standards (Common Core, NGSS, state frameworks) | Standards databases, crosswalk mappings                    |
| **CLR**       | Portable learner records across platforms                             | Transcript formats, credential verification                |

Timeback extends these standards where necessary to support learning science requirements (mastery thresholds, XP policy and validation, closed-loop validation) while maintaining compatibility with the base specs.

<Tip>
  Standards let apps work together. A tutoring app can read progress from an assessment app
  because both use the same data model.
</Tip>