Locate three sources and evaluate their credibility.

Source one:

Source title: NCAA Course Work Requirements

What makes this a creditable source: This is a creditable source because it is run by the College board. 

Information for MLA citation: Website: http://professionals.collegeboard.com/guidance/prepare/athletes/ncaa Authors: college board. Last seen: June 26 2014.

Source two:

Source title: New NCAA rules will require incoming athletes to meet higher academic standards to play a Division I sport in college
What makes this a creditable source: This is a daily news website.
Information for MLA citation: Authors:Seth Walder  Updated:November 23 2011 Last seen: June 26 2014 Website: http://www.nydailynews.com/sports/high-school/new-ncaa-rules-require-incoming-athletes-meet-higher-academic-standards-play-division-sport-college-article-1.982115

Source three:

Source title: Varsity Green
What makes this a creditable source: It fits all of the necessary criteria's for it to be a creditable source.
Information for MLA citation: Author: Mark Yost  Publisher: Stanford Economics and Finance/Stanford Unive. Publish date: Jan.1.2010.