Using LTI for assessments
Through IMS Global Learning Consortium’s Learning Tool Interaction (LTI) standard, LTI users of applications can make use of TAO-designed tests and deliver them to students through an LTI platform, such as the Moodle platform which is also Open Source.
“The principal concept of LTI is to establish a standard way of integrating rich learning applications (often remotely hosted and provided through third-party services) with platforms like learning management systems, portals, learning object repositories, or other educational environments.” (IMS Global Learning Consortium)
To explain how to connect TAO to an LTI consumer, we will be utilizing the Moodle Open Source project though you could similarly attach TAO to any LTI compliant application.
In this scenario, test authors can take advantage of the ease of using TAO to create their Items and Tests while using the Moodle platform to deliver the Tests in their LMS.
The test-taker tools available in TAO (such as the magnifying glass and the line reader) are also available when tests are delivered via an LTI consumer, as is the option to do the test on a full screen. The LTI consumer can specify which of these tools are available for which test-takers, thus adapting the assessment scenario for students with special needs. See for a list of the tools available.
As an administrator, you must have Administrator privileges for both TAO and Moodle. As a teacher, you must have Teacher privileges in Moodle and Test Delivery privileges in TAO.
The LTI interconnectivity must be set up prior to executing the delivery.
Setting up a TAO-Moodle delivery as an LTI Administrator
1. Ensure that TAO is configured for LTI.
You will need to verify that the ltiDeliveryProvider is installed, instructions for accessing and installing an extension can be found on the Extensions Manager page.
To manage LTI Consumers, hover over the cogs icon in the Assessment Builder Bar and select LTI Consumers.
Select the LTI Consumer class (folder), and click on Add Consumer. Name (label) the new consumer. Decide on a key with which to identify the new LTI consumer and enter it in the box OAuth consumer key. TAO will then generate a secret key corresponding to this consumer in Oauth consumer secret. This is generated automatically as a security measure, to ensure that it is sufficiently complex. The new consumer will be asked to provide this key when accessing TAO.
Note: The OAuth consumer key must contain only alphabetical and numeric characters.
The callback URL can be left blank. Finally, click on Create. If the consumer does not immediately appear, reload the page and it should come up. Record the URL of the page – this is your Tool Base URL.
2. Ensure Moodle is correctly configured.
Go to Site Administration in the Moodle platform. The following are for version 3.7, if your version differs refer to the appropriate Moodle documentation.
Go to Site Administration and then click on the Plugins tab. In the Activity modules section, click on Manage Activities. Go to the External tool and then click on settings.
To configure TAO in the Moodle, click on Add preconfigured tool. Add an appropriate name to the new configuration as the Tool name.
Next enter the Tool URL which will be
/ltiDeliveryProvider/DeliveryTool/launch. (If you don’t know the URL of your TAO installation, return to the TAO back office home, and copy the URL, removing
tao/Main/index from the end. For example, if your TAO home is
http://<hostname or IP>/tao/tao/Main/index, then your root URL would be
http://<hostname or IP>/tao/.)
Last, enter the Consumer key (OAuth consumer key) you used in TAO and the consumer secret (Oauth consumer secret) which was generated by TAO and then click on Save Changes.
Executing a TAO delivery in Moodle as an LTI Teacher
1. Create and Compile a new Delivery within TAO.
Follow the steps used in Create a New Delivery to create your Delivery. Click on the Delivery you just created and then click on the icon and then copy the Launch URL that this action generates.
2. Deliver the test in Moodle.
First, open your course in edit mode, then click on Add an activity or resource. Select External Tool, and click Add.
Give the activity an appropriate name and then paste the URL taken from TAO in the previous step into the Tool URL field. This should produce a green check mark to the right of the URL.
Finally, click Save and then return to the course. Your TAO delivery should now have been added to the Moodle course.
3. Test out the Delivery in Moodle.
Log in using a test account, i.e. a Test-taker profile set up for test purposes, to ensure that the delivery works as planned. Select the course and then click on the activity. If everything works as desired, no further action will be required. If not, then you will need to troubleshoot the delivery in TAO, ensuring that it is fully functional.