CSC/ECE 517 Fall 2014/final E1471 asuv

Expertiza - Information Display and Student Interaction

Expertiza is a web application developed using Ruby on Rails that serves as a peer-review system. The application allows students to submit and peer-review learning objects (articles, code, web sites, etc)<ref>Expertiza on GitHub</ref><ref>Expertiza Wiki Page</ref>. It is an open source project and it's codebase is maintained in GitHub.

Introduction

Our contribution in this project would be to improve the display of questionnaires for all the instructors and also integrating a previous project which provides a new dashboard for students to view and compare their performance of each assignment.

Current State

• In the current state instructor should go through all the questionnaires to find the one they are looking for.
• The keyword search functionality is not yet implemented for questionnaires.
• The current student dashboard provides the average score and range of the student’s assignment, review and final score.
• The system has a limitation where in a student/instructor cannot view and compare the student scores based on the class performance.

Goals

• As a part of our project we will implement the search functionality and also make it possible to click and bring up a list of questionnaires used in the course, expanding only the applicable questionnaires in the list of questionnaires.
• A project from last year has the implementation for the new student dashboard. We would like to take that project, make the required changes to it and integrate it into expertiza.
• This new dashboard gives the students a comparative statistics for that particular assignment for the entire class.
• Giving the min, mean and max gives the student a range to judge where they stand with respect to the class.
• Other features were part of the project were to show the number of reviews and metareviews he/she has done for this assignment and also based on a threshold what are the number of reviews/metareviews the student still needs to do.
• A histogram distribution of the scores of the class (all teams) for that assignment would also shown as a part of the dashboard.

Approach

As the project was originally assigned to students two years ago, the functionality is mostly complete. The main concern is that, as the project was completed a significant amount of time ago (in December 2012), it was made for an older version of rails.

General Approach

Our general approach to the project would be as follows:

• Run the current project with rails 4
• Check the functionality to find out the incompatible and missing parts
• Refactor the parts of code that do not function as expected and port them to rails 4 specification
• After making sure everything runs, refactor the entire code to make sure it follows the global code rules.

Specific Approach

The specific approach to each of the two functionality is as follows:

Better display for assignments

We found that while the currently existing code covers most of the functionality, a major part of the functionality is missing. According to definition, the instructor should see the following on his home page:

• The instructor's courses
• Assignments for those courses
• Questionnaire by assignment name

Each of these should be compressed to titles only, and it should be possible to expand them by single mouse click. Each course should have its own list of assignments which can, again, be expanded. Also, there is a search box on the page which allows to search assignments, courses and questionnaires.

The search functionality for assignments and courses is working well, but the search for questionnaires is not implemented.

So, for this specific project, we plan to focus on implementing the search for questionnaires first. Then, integrate it all and test each functionality: make sure that nothing is affected by the new functionality added. After all the tests are performed, we will merge the project with the main project, thus integrating it with the final build.

Dashboard for students

The features required for the dashboard for students project have already been implemented. So, the main task to be performed by us is to merge the project files with the main project and make sure that nothing else is affected by the process.

The current code is able to display the maximum scores, average scores, number of reviews and distribution charts.

Files involved

Files to be merged : Dashboard for students

• Model
ScoreCache.rb
• View
grades\view_my_scored.html.erb
• Controller
• grades_controller.rb, review_mapping_controller.rb,response_controller.rb
• Database tables
Assignments,Participants, score_caches, response_maps,responses

Functionality of each file

Sr. No.	File Name	Type	Functionality for this project
1	ScoreCache.rb	Model	Makes an entry into score_cache table whenever a response is given/edited
2	grades\view_my_scores.html.erb	View	Modified in order to display all new features
3	grades_controller.rb	Controller	To get information all information about an assignment and its score which is average score of all reviews and plotting the graph for grade distinction
4	review_mapping_controller.rb	Controller	To get additional information about assignment like total reviews submitted
5	Assignments	Table	All information related to assignment
6	Responses	Table	Stores individual assignment review response information
7	Score_caches	Table	Stores individual assignment review score information
8	response_maps	Table	Mapping between response, reviewer and reviewee

Files to be changed : Better display of assignment

• Model
course_node.rb,assignment_node.rb,questionnaire_node.rb
• View
tree_display\ _row_header.html.erb,tree_display\ _entry.html.erb,tree_display/actions/_courses_actions.html.erb
• Controller
tree_display controller.rb,course_controller.rb,assignment_controller.rb,questionnaire_controller.rb
• JavaScript
tableactions.js

Functionality of each file

Sr. No.	File Name	Type	Functionality for this project
1	course_node.rb	Model	To fetch information about all course none in the system
2	assignment_node.rb	Model	To fetch information about all assignment node in the system
3	questionnaire_node.rb	Model	To fetch information about all questionnaire node in the system
4	tree_display controller.rb	Controller	For direct access to every entity like questionnaires, review rubric etc..
5	tree_display\ _row_header.html.erb	View	Display of header in a row
6	tree_display\ _entry.html.erb	View	Display entity in a row
7	tree_display/actions/_courses_actions.html.erb	View	Display separate actions on each row
8	course_controller.rb	Controller	Provides various course related functions
9	assignment_controller.rb	Controller	Provides various assignment related functions
10	questionnaire_controller.rb	Controller	Provides various questionnaire related functions

Use case

UML diagram

References

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