DISRUPTING LABOR MARKETS: There may be nearly 10 million Americans qualified for the 3.7 million K-12 teaching positions in the US. But the number masks "persistent teacher shortages by geography, grade level and subject area for nearly 40 years," according to a recent white paper from the Clayton Christensen Institute. The report examines how women's rights and technology have made other industries more productive and lucrative, but argues that online learning can "modernize the nation’s antiquated systems for filling teacher vacancies." Here's the caveat: policymakers will have to make big changes, such as removing seat-time requirements to competency-based methods for awarding online class credit.