The four R's: readin', 'ritin', 'rithmetic, and R! <http://www.r-project.org...

		edwingustafson on Feb 15, 2013 \| parent \| context \| favorite \| on: Obama endorses required high school coding classes The four R's: readin', 'ritin', 'rithmetic, and R! <http://www.r-project.org/>;