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https://apluslms.github.io/assets/images/apluslogo.png

title:Architecture of A+ LMS
Author: Jaakko Kantojärvi
description:Short presentation about high level architecture of A+ LMS and it's microservices
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Architecture of A+ LMS

Flexibility from microservices

What is A+ LMS?

A+ is a learning management system.

  • Online course material
  • Automatic assessment for exercises
  • Interactive learning elements
  • Exercise point management per student

Note

  • features of any LMS

Why A+ when there is other systems?

  • Can safely evaluate code from students
  • Student groups created by students themselfs
  • Good course material workflow
  • Flexible and extendable architecture
  • Easy to create new assestment tools
  • Easy to connect new external services
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Microservices

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Why multiple services?

  • Each service does one thing well
  • Makes system flexible
  • Using existing parts is simple
  • One course doesn't break others
  • Custom tools for single course
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A+: the student interface

  • User authentication via University IdP or Google
  • Does access control (student, assistant, teacher)
  • Bookkeeping: exercise points and grade
  • Notifications

Note

  • handles auth
  • access control: student, assistant, teacher
  • bookkeeping: points, submissions
  • notifications: exercise is graded, feedback from staff
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Learning content

  • Text material (html & css)
  • Exercise (html form / javascript)
  • Retrieved from other services
  • Represented as part of A+

Note

  • A+ doesn't care where the content comes from
  • Content is served via A+
  • anything that is HTML / CSS / javascript
  • submissions tracked by A+
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Exercise assessment

  • Simple html post and response
  • Synchronous assessment (questionnaires)
  • Asynchronous assessment (programming exercises)
  • Assessment grade is recorded into A+

Note

  • Simple protocol
  • Easy to create custom grading service
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MOOC-Grader

  • Safe way to evaluate student code
  • Environment defined with Docker images
  • Processing pool handled by Kubernetes
  • Assessment request from A+
  • Asynchronous response when evaluation is completed
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Other assessment services

  • ACOS - interactive exercises to multiple LMSes
  • Rubyric - report assessment, peer review
  • MOOC-Jutut - interactive feedbacks
  • Radar - plagiarism checking (for code)
  • Create more with simple http+form protocol!
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External & Utility services

  • Piazza - Discussion forum
  • Code paste - Tool for students to share snippets
  • Assist queue - Fair assistant time use
  • Easy to create or connect more services
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Material authoring

  • Write material in Ariel (reStructuredText)
  • or with something else
  • Compile material to html and yaml with Roman
  • Write unit tests for programming exercises

Note

  • ariel - formelly known as a-plus-rst-tools
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Test on your machine

  • Test early and break things before production
  • Develop docker image to work with your exercises
  • Rapid development
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Push for production

  • Manage changes with git
  • Push changes to staging
  • Push working version to production
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Automatic update

A+ and other services are automatically updated

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Share material

  • Use gitlab/github/etc to share material
  • Collaborate with other Universities
  • Teacher writes material
  • Assistant creates exercise unit tests
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A lot of existing work!

Ohjelmointi 1 & 2, Studio 2

Scala exercises

Animated storytelling

JSVEE code animations

Example code annotations

Questionnaires with specific hints

Git tutorial (Studio 2)

Ohjelmoinnin peruskurssi Y1 & Y2

Python exercise

UML modelling (Y2)

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A lot of existing work!

Data Structures and Algorithms Y & S.

JSAV visual algorithm exercises

Databases

Relational algebra

SQL queries

Tietotekniikka sovelluksissa

Numpy, Matlab, LabVIEW, SQL, HTML

A lot of existing work!

Mobile Cloud Computing

Assess Android software with a virtual screen

Web Software Development

Assess web code using virtual web browser automation

Exercises submitted as git repository

Nearly anything is possible with containers!

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Interoperability

  • Microservices are reusable with other LMSes
  • For moodle, there is mod_astra. with implementation for core A+ features.
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Questions?

More info on

apluslms.github.io

Architecture of A+ LMS by Jaakko Kantojärvi

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