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LTI 
Learning Tools 
Interoperability™ 
on EdX Platform 
Sep 17 2014 
github: iceraj 
email: ceraj@mit.edu 
Ivica Ceraj
Is LTI the right solution for me? 
LTI external server &| lots of computation 
uses iframe 
stores large amount of state T...
Is LTI the right solution for me? 
LTI external server &| lots of computation 
uses iframe 
stores large amount of state 
...
About LTI 
IMS Global Consortium defines Learning Tools Interoperability™. 
There are two revisions of LTI: 
LTI 1.1 - htt...
What do we get from LTI 1?
LTI1 spec declares 
Basic Launch Data 
OAuth Signing 
Outcome service 
specs 
28+ params 
9 params 
replaceResult 
readRes...
And LTI2? 
Source: IMS Global
LTI v2.0: Learning Tools (with full) Interop 
● REST-level 3 Web Service Model 
● JSON-LD for Payload Definition 
● Discov...
LTI Demo 
Open edX studio 
Open LTI problem 
Demonstrate grade propagates
End User System Interactions 
Browser edX server LTI 
initial request 
iframe tag 
iframe request to lti (oauth signed) 
t...
LTI and edX Studio 
http://edx-partner-course-staff.readthedocs.org/en/latest/exercises_tools/lti_component.html 
1. Setti...
External Resources 
IMS Consortium: http://www.imsglobal.org/ 
IMS Catalog: http://www.imsglobal.org/cc/statuschart.cfm 
E...
LTI tools and demos 
Python: 
Library: https://github.com/mitodl/ims_lti_py 
Demo: https://github.com/mitodl/ims_lti_py_dj...
Thank you! 
Q: Should we join IMS Developer program? 
Q: Should we support LTI/edX library for MIT? 
Q: Which languages? 
...
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Light Technical Introduction to LTI on edX

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Light Technical Introduction to LTI on edX

Introduction to state of LTI on edX
Links to code that demonstrates LTI integration
Details on how to add to Studio

Published in: Education
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Light Technical Introduction to LTI on edX

  1. 1. LTI Learning Tools Interoperability™ on EdX Platform Sep 17 2014 github: iceraj email: ceraj@mit.edu Ivica Ceraj
  2. 2. Is LTI the right solution for me? LTI external server &| lots of computation uses iframe stores large amount of state THIS TALK
  3. 3. Is LTI the right solution for me? LTI external server &| lots of computation uses iframe stores large amount of state JS Input a bit of grading computation uses iframe stores small to medium amount of data etcX a bit of grading computation in-page integration (auto-scaling, better control) stores small to medium amount of data THIS TALK NOT THIS TALK NOT THIS TALK
  4. 4. About LTI IMS Global Consortium defines Learning Tools Interoperability™. There are two revisions of LTI: LTI 1.1 - http://www.imsglobal.org/LTI/v1p1p1/ltiIMGv1p1p1.html LTI 2.0 - http://www.imsglobal.org/lti/ltiv2p0/ltiIMGv2p0.html LTI 1.1 older and simpler better support within edX LTI 2.0 newer and discoverability works with edX LTI 1.2 public draft - i.e. if you don’t need LTI 2.0 no need to upgrade
  5. 5. What do we get from LTI 1?
  6. 6. LTI1 spec declares Basic Launch Data OAuth Signing Outcome service specs 28+ params 9 params replaceResult readResult deleteResult edX 9 params 9 params replaceResult edX implementation of LTI v1 is simple and functional.
  7. 7. And LTI2? Source: IMS Global
  8. 8. LTI v2.0: Learning Tools (with full) Interop ● REST-level 3 Web Service Model ● JSON-LD for Payload Definition ● Discoverable Services ● Automatic Credential Exchange and Management ● Architected Services ● Tool Settings ● Organization Hierarchy ● Partner-Provided Services EdX support for LTI v2.0: “We are also committed to the potential of LTI (learning tools interoperability), both expanding what we offer via the LTI 1.1 protocol and expanding into LTI 2.x to enable grades to transfer to the LMS and course launch from other environments. Members of our open source community are stepping forward to lead these initiatives, and we will support their work in order to help those projects succeed.” - Beth [ref: http://engineering.edx.org/]
  9. 9. LTI Demo Open edX studio Open LTI problem Demonstrate grade propagates
  10. 10. End User System Interactions Browser edX server LTI initial request iframe tag iframe request to lti (oauth signed) tool in iframe student submits answers lti sends grade to edX (oauth signed) edX acks lti sends confirmation to student Use case: ● Launch external tool ● Get graded result (optional) Security: ● Shared secret ● OAuth signing User’s experience: ● iframe ● new browser window
  11. 11. LTI and edX Studio http://edx-partner-course-staff.readthedocs.org/en/latest/exercises_tools/lti_component.html 1. Settings -> Advanced Settings: Advanced Module List: [“lti”] LTI Passports: ["lti_starx_add_demo:__consumer_key__:__lti_secret__"] 2. Add Problem Set Type Advanced -> “LTI” 3. Edit Open in new page -> open in new window or inline LTI ID -> passport “lti_starx_add_demo” Scored -> is it scored (LTI server returns 0-1) Weight -> grade = weight * score(0,1)
  12. 12. External Resources IMS Consortium: http://www.imsglobal.org/ IMS Catalog: http://www.imsglobal.org/cc/statuschart.cfm Edu Apps: https://www.edu-apps.org/index.html Some LTI Apps (from Edu Apps): YouTube, WordPress, Piazza, MyOpenMath, TED Ed,...
  13. 13. LTI tools and demos Python: Library: https://github.com/mitodl/ims_lti_py Demo: https://github.com/mitodl/ims_lti_py_django Live demo: http://ims-lti-py-django.herokuapp.com/ I am tasked with: Developing it for PHP and couple of other languages
  14. 14. Thank you! Q: Should we join IMS Developer program? Q: Should we support LTI/edX library for MIT? Q: Which languages? Q: Should we work w/ LTI2? Q: Does MITx have courses using LTI2? Q: Should we have talk on JSInput? Q: Should I talk about etcX?

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