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  1. Student: MIT student, general experience with Internet sites, most of them have used Facebook#* Age: 17~24 
    • Gender: any
    • Culture: college students, specifically, MIT students
    •  Language: English
    • Education: college
    • Physical limitation: not considered in this design

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    • Computer experience: vast

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    • Motivation: motivated, as the student registered for the course

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    • Attitude: mixed; some students are really excited about the class, most just want to get the homework over with

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    • Domain experience: ~12 years of experience writing and submitting homework, >=1 year of experiencing using online homework submission system

          o Application experience: generally familiar with web applications and the concept of uploading files, many have not used online submission systems

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  1. Account Creation## Goal: Create and configure an account to get access to the user-specific features of the website## Precondition: have email address, the course number of the class to join, (optionally MIT email / MIT ID number)## Subtasks:### Fill basic information form, including email address, password, (optionally MIT email / MIT ID number)### Validate the account by clicking on a link in an email### Register for the class or be marked as an instructor by an administrator
      1. Optionally provide details for the public profile (nickname...)
    1. Frequency of use: first time of use
    2. Exceptions: enter wrong email address, wrong class number, wrong name
  2. Submitting homework, answering surveys (how many hours, etc.), and checking your grades## Goal: Have your problem set be evaluated by the TAs## Precondition:### The user must have an account### Homework should have been assigned by an instructor## Subtasks:### Upload your problem set as a PDF file### Optionally answer a survey### Check your problem set and quiz grades
    1. Frequency of use: weekly
    2. Exceptions: submit the homework not on time, wrong format of documents, forgot to attach documents before submitting. 
  3. Creating/Editing problem sets## Goal: Defining the files that students must upload for a problem set, and the grading structure.## Precondition:### The user must have registered as a TA### A designed problem set.## Subtasks:### Creating a new problem set or editing an old one### Defining files to be submitted for the problem set### Defining what gets graded and the grading scale
      1. Marking the problem set available for submission and set a deadline
      2. Optionally: decide late policy, enable extension
    1. Frequency of use: weekly
    2. Exceptions: creating a wrong pset
  4. Grading problem sets## Goal: Having a grade for each of the students’ submissions## Precondition:### The instructor needs to have a problem set prepared### Students must have submitted solutions## Subtasks:### Printing out student solutions for grading### Grading### Inputting the problem set grades for distribution to the students
    1. Frequency of use: weekly
    2. Exceptions: entering a wrong grade, missing grades

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