In the ever-shifting world of school choice, what began as a homegrown charter-school network's small experiment in microschooling stands out as unique -- and as a uniquely promising model for replication. Gem Prep, a network of seven brick-and-mortar K-12 charter schools in Idaho, anchored by a longstanding and high-performing online school,…

America has a long history of small-school environments, such as one-room schoolhouses and homeschools. But in recent years, other models have developed, giving students more intimate settings for learning and enabling their families to play a larger role in their schooling. Microschools are a leading example of this growing sector that also…