Do Colorado's high school civics requirements affect the number of young people who vote?

A new study disparages Colorado for requiring little civics education -- something it ties to a poll showing that young people don't understand voting laws, such as whether a photo ID is required to vote. (It isn't in Colorado.) But the study, done by the Massachusetts-based Center for Information and Research on Civic Learning & Engagement, or CIRCLE, left out recently approved social studies testing rules that go into effect in 2014.