LTI 1.3

LTI (Learning Tools Interoperability) is a standard that allows external learning tools to be embedded within Chamilo. Version 1.3 is the latest and most secure version of the standard.

What LTI Allows

With LTI, you can embed external tools within Chamilo courses. Examples:

• Interactive simulations

• Specialized assessment tools

• Content authoring tools

• Virtual labs

• Third-party content libraries

The external tool appears seamlessly within the Chamilo interface.

Configuring an LTI Tool

As an Administrator

1. Navigate to the LTI settings in the administration panel

2. Register the external tool by providing:

   • Tool name — A descriptive name

   • Login URL — The OIDC login initiation URL of the external tool

   • Redirect URL — The launch URL the tool returns to after login

   • Client ID — Provided by the tool vendor

   • Public keyset URL (JWKS URL) — The tool's JWKS endpoint for security key exchange

3. Configure grade passback — Whether the tool can send grades back to Chamilo

4. Save

As a Teacher

Once an LTI tool is registered by the administrator, teachers can add it to their courses:

1. In the course, look for the option to add an external tool

2. Select from the registered LTI tools

3. The tool appears as a course tool on the homepage

Security

LTI 1.3 uses:

• OAuth 2.0 for authentication

• JSON Web Tokens (JWT) for message signing

• Public/private key pairs for verification

This means credentials are never shared directly between Chamilo and the external tool.

Grade Passback

LTI tools can send grades back to Chamilo, which can be integrated into the course gradebook. This is configured per tool during registration.

Tips

• Verify tool compatibility — Ensure the external tool supports LTI 1.3 (not just older versions)

• Test in a sandbox — Test the LTI integration in a test course before using it in production

• Monitor performance — External tools add network dependencies. Ensure the tool is responsive and reliable.