There’s a Reason There Aren’t Enough Teachers in America. Many Reasons, Actually.

Here are just a few of the longstanding problems plaguing American education: a generalized decline in literacy; the faltering international performance of American students; an inability to recruit enough qualified college graduates into the teaching profession; a lack of trained and able substitutes to fill teacher shortages; unequal access to educational resources; inadequate funding for schools; stagnant compensation for teachers; heavier workloads; declining prestige; and deteriorating faculty morale.

Nine-year-old students earlier this year revealed “the largest average score decline in reading since 1990, and the first ever score decline in...