Featured Research

from universities, journals, and other organizations

CrowdGrader brings crowdsourcing to the task of grading homework

Date:
September 11, 2013
Source:
University of California, Santa Cruz
Summary:
A new crowdsourcing tool that gets students involved in grading, CrowdGrader allows students to submit their homework online and then distributes the submitted solutions anonymously to other students in the class for grading.

Grading homework assignments for a large class can be a time-consuming chore, and overworked teaching assistants often have little time to give students detailed feedback. But help may be on the way: A new crowdsourcing tool developed at the University of California, Santa Cruz, lets students get involved in the grading.

Related Articles


CrowdGrader (www.crowdgrader.org) allows students to submit their homework online and then distributes the submitted solutions anonymously to other students in the class for grading. Using a novel crowdsourcing algorithm that relies on a reputation system to assess each student's grading accuracy, CrowdGrader combines the student-provided grades into a consensus grade for each submission. As an incentive to take the grading task seriously, each student's overall grade for an assignment depends in part on the quality of his or her work as a grader.

Luca de Alfaro, professor of computer science at UCSC's Baskin School of Engineering, worked with graduate student Michael Shavlovsky to develop CrowdGrader. They have been evaluating it for programming assignments (C++, Java, and Android) in computer science classes taught by de Alfaro and others at UCSC and at the University of Naples in Italy. Though still an experimental project, the preliminary results are encouraging, de Alfaro said.

"My impression is that the accuracy is not perfect, but it's no worse than what a TA does. There is always imprecision in grading," he said. "The real benefit is in the learning experience."

Grading other students' work actually helps students develop their programming skills, he said, because they get to see how other students have solved the same problem. Also, because their own work is graded by up to five other students, they get more feedback than they do from a teaching assistant.

"TAs are fairly consistent in the way they grade the homework submissions, but they tend to have schematic grading criteria that focus on some things and might miss others. From what I saw, the feedback from students gave a more holistic evaluation of the students' work," de Alfaro said.

De Alfaro and Shavlovsky described CrowdGrader in a recent technical report (arxiv.org/abs/1308.5273), which also presents the results of preliminary user studies. While more user studies are under way, de Alfaro said that he was happy with the results so far. He plans to use CrowdGrader in more classes this fall.

Crowdgrader is available online (www.crowdgrader.org), and anybody can use it. "It's hosted on a very stable platform, so if anybody wants to try it for their own classes, they can," de Alfaro said.


Story Source:

The above story is based on materials provided by University of California, Santa Cruz. Note: Materials may be edited for content and length.


Cite This Page:

University of California, Santa Cruz. "CrowdGrader brings crowdsourcing to the task of grading homework." ScienceDaily. ScienceDaily, 11 September 2013. <www.sciencedaily.com/releases/2013/09/130911160911.htm>.
University of California, Santa Cruz. (2013, September 11). CrowdGrader brings crowdsourcing to the task of grading homework. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2013/09/130911160911.htm
University of California, Santa Cruz. "CrowdGrader brings crowdsourcing to the task of grading homework." ScienceDaily. www.sciencedaily.com/releases/2013/09/130911160911.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Computers & Math News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

EU Pushes Google For Worldwide Right To Be Forgotten

EU Pushes Google For Worldwide Right To Be Forgotten

Newsy (Nov. 27, 2014) Privacy regulators recommend Google expand its requested removals to apply to all its web domains. Video provided by Newsy
Powered by NewsLook.com
Predictions Of Tablets' Demise Sound Familiar

Predictions Of Tablets' Demise Sound Familiar

Newsy (Nov. 26, 2014) The tablet's days are numbered, at least according to a recent IDC report. The market-research firm paints a grim outlook for tablets. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com
FCC Forces T-Mobile To Alert Customers Of Data Throttling

FCC Forces T-Mobile To Alert Customers Of Data Throttling

Newsy (Nov. 25, 2014) T-Mobile and the FCC have reached an agreement requiring the company to alert customers when it throttles their data speeds. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins