Politifact’s truth-o-meter gives generous score of ‘half true’ to AFT President Randi Weingarten’s claim about teachers unions and achievement on This Week. Some background on the issue here. In Slate Jack Shafer provides the hardest-hitting case on behalf of the LA Times on value-added yet. Harder than the LAT itself! And in the RTD Kris Amundson turns in her summer homework and challenges the commonwealth’s educational stance.