Sugar Labs

Karma

Revision as of 06:01, 1 January 2010 by BryanWB (talk | contribs) (→‎Status)
Karma.png

The Karma Project

Karma is a framework for creating educational software using JavaScript, html5, and SVG. The Karma team is primarily focused on developing Sugar activities but you can also Karma to create lessons that run in any web browser that supports html5. The best ways to get involved are to join the mailing list and get the code

Rationale

Anyone with a modern standards-compliant web browser and a text editor should be able to create learning activities that can be used by anyone with a computer. Sugar should not be a walled garden that only allows learning activities expressly designed for it and it alone but rather gives extra power and depth to learning activities. Karma uses a specialized vocabulary that features a number of specialized terms. Please refer to the Karma Dictionary early and often.

Status

Karma is a sub-project of Sugar Labs that is under active development as a part of a Google Summer of Code project. The latest examples can be seen at http://karma.sugarlabs.org. You can also check out the Karma Project blog for updates.

To try out the karma examples you need to have an html5-capable browser. The Browse activity within Sugar does not currently support html5. To try out karma within Sugar you need to install Surf and its webkit dependencies or run Firefox 3.5 from the command-line (yum install pywebkitgtk WebKit-gtk gnome-python2-gconf).

The current focus of development is to convert Nepal's set of lessons coded in Squeak smalltalk. You can find the list of lessons to be converted here. This is a good place for new contributors to get started

What Karma Is

  • Karma is a simple framework to create simple interactive learning activities primarily for Sugar but also to be viewable through any web browser that supports html5
  • Karma is used to create simple activities that run off-line w/out access to the Internet
  • Karma is for web developers who want to contribute to Sugar using their current skills
  • Karma is built on top of open web standards such as html5, javascript, and CSS.
  • Karma is built to run on top of web browsers that support html5, particularly the canvas element.
  • Karma is built around the concept of individual "lessons" and multiple lessons can be aggregated into a sugar activity
  • Karma is the evolution of OLE Nepal's work on the EPaath suite of lessons in Nepal
  • Karma is designed with pervasive and easy internationalizaton in mind and integration with moodle, particularly for monitoring student progress
  • Karma is pedagogically agnostic. Pedagogical choices are left to the lesson author.

What Karma Isn't

  • Karma is not compatible with Internet Explorer because Internet Explorer does not support html5 apis such as canvas, svg, localStorage, etc.
  • Karma is not meant to replace pyGTK as the dominant toolset for creating Sugar activities
  • Karma is not a tool for creating activities with complex 3D graphics. Karma is a tool for creating activities with simple 2D graphics
  • Karma is not meant as a basis for a WYSIWG programming environment like TurtleArt, EToys, or Logo
  • Karma is not built to support browsers that do not support html5, such as Internet Explorer and Firefox < version 3.5
  • Karma is not intended to teach programming to children though it could be used as such

Design Philosophy

A Karma lesson is composed of a valid html5 document, javascript code, and css stylesheets and optional assets such as images, audio, video and lesson plans. Karma should be very easy for inexperienced developers to understand and work with. Even non-programmers should be able to make visible changes by tweaking the code and liberal use of cut-and-paste. Complexities such as integration with pootle, local storage, and certain types of animation should be abstracted so that novice developers don't have to understand them in order to effectively use Karma. Karma strictly adheres to the Model-View-Controller Pattern and similarly to unobtrusive JavaScript. In essence. you should be able to substantially change the look and feel of a Karma lesson by modifying the CSS or you could translate the activity, without having to understand the JavaScript code.

Design Goals

  • Unobtrusive JavaScript
  • No globals
  • No extension of native objects

Technical Architecture

  • Run-time - Karma will work with basic functionality on any W3C standards-compliant browser that supports HTML5 tags canvas, audio, and svg. This notably excludes Microsoft's Internet Explorer. Karma will be particularly tailored to work with Sugar's Journal and collaboration through Telepathy. Longer-term we hope to extend Karma to take advantage of Sugar's collaboration features.
  • Primary Programming language - Javascript 1.6
  • i18n -- Pervasive internationalization is a critical part of Karma
    • Supported types of i18n -- ToDo
      • Output of Native Digits
      • Image switching per locale
      • Regular text, though it is unclear how to support plural forms, grammar shifts, and gender
      • Audio switching per locale
    • Integration with pootle
  • Utilities -- we primarily use narwhal for command-line scripting and jsdoc for documentation
  • Journal, Telepathy Integration -- method to be determined, perhaps using html5's offline storage feature, some resources here and here
  • Moodle Integration -- method to be determined
  • Repo and Bundle layout

Conventions

 The following are valid names
 karma_3_Maths_LargestNumber_15
 karma_2_English_MatchingPuzzle
 karma_6_Maths_AddingUpTo10_4
  • Version Control and repository management see the Version Control section of this page
  • Unit testing is required for the karma.js library but not for individual lessons http://karma.sugarlabs.org/tests/
  • Project Documentation kept in the Sugar Labs wiki
  • Coding conventions: Based on Dojo Style Guide
    • Use camel-case for function names and variables
    • Exception to above -- object constructors should start with a capital letter
    • boolean variables should be prefixed with "is", "has", "can", or "should"
    • counters should be prefixed with "num" or "count"
    • Whenever possible, use jslint
  • File naming conventions: lowercase letters, underscore instead of spaces (need to write more about it)

Version Control

Currently all lessons are stored in the examples/ folder of main karma repository

We plan to move all lessons into individual repositories at git.sugarlabs.org but only once we have a process to automatically build bundles.

When we do move to individual repos we shall use the karma_lesson template for each new lesson repository

Here is how you can use the karma_lesson template to create a new repository from scratch 

 $ git clone git://git.sugarlabs.org/karma_lesson/mainline.git
 $ mkdir ../karma_3_English_3  # create a new lesson directory following our naming convention
 $ cp -r * ../karma_3_English_3  
 $ cd ../karma_3_English_3
 $ rm -r .git     # make sure you get rid of the old git directory
 $ git init
 $ git add .
 $ git commit -a -m "first commit"

Now go to the http://git.sugarlabs.org/projects/new, make sure you are logged in Create a new project, use the same name as you did for your lesson's main folder then, 

 $ git remote add origin git://...   # the pubic push url

Then on to coding your lesson ;)

From then on 

$ git push origin master   # will sync your local tree w/ the server

Tagging -- a karma lesson can be in only one of two states, stable or unstable. Any commit tagged 'stable' is the stable version of your code. Every other version of your code is unstable. We will not use numeric versioning such as 0.1, 1.0, 1.2, etc. for the foreseeable future.

Meetings

Karma:Meeting 21 December 2009

GSoC Project

Karma started as a GSoC project with Felipe Lopez Toledo "SubZero" as the student participant and Bryan Berry as mentor.

GSoC Meetings

Notes from GSoC meetings - kept for archival purposes

Project Roadmap

0.1 "Osito"

Was completed September 11, 2009

  • 1 Working example in "adding_up_to_10"
  • cleaned up documentation with jsdocs api documentation and cleaned up README.txt
  • integrate chakra and "adding_up_to_10" and knavbar
  • adding_up_to_10 works on the XO
    • Surf
    • Browse

0.2 "Gatito"

Due mid-December 2009

This release is timed to coincide with Bryan's visit to Google HQ for the GSoC Mentor's Summit

  • unit testing added to karma.js using QUnit -- DONE
  • API documented w/ jsdoc-toolkit
  • support for SVG and canvas animation -- DONE
  • 3 working examples
    • Adding_Up_to_10 using both SVG and canvas -- DONE
    • Quadrilaterals -- 50% done
    • "Conozco A Uruguay" done with karma -- 50% done


0.4 "niño"

Due 31 January 2010

  • Full i18n support
  • Integrate all of the existing E-Paath lesson into chakra
  • narwhal build script to build one giant karma bundle w/ all the E-Paath lessons inside it and chakra
  • At least 6 lessons ready that have been translated into 3 languages each
  • Version 0.1 draft of karma specification done

1.0 "Muchacho"

This release may also be called "Karma 1000" and is a big wishlist

  • Full moodle integration
  • Offline storage and synchronization with moodle
  • Integration with the Sugar Journal
  • Integration with Telepathy on Sugar
  • fully functional "kpages"

Library

here lies a lot of links to resources specific to karma

UI

HTML5

General Web Design

Canvas

SVG

Javascript


Coding Tools and Conventions

  • Firebug --- http://www.getfirebug.com
  • Web-Inspector --- webkit's answer to firebug
  • Browsers --- We primarily work with Chromium and Firefox > 3.5
  • For emacs users -- nxhtml mode and magit.el for working w/ git
  • jslint
  • inkscape
  • narwhal

Subpages

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