The digital revolution occurring in schools has focused predominantly on online education in its various forms--including fully online courses, learning management systems, games, and mobile applications--to personalize learning and boost the performance of all students. Companies have been experimenting with technologies for years, yet these technologies have had little impact in actual K-12 schools. Using all of them productively still seems far off in the future, as in combination they can create more work for teachers without providing what teachers and students actually need. Author Michael Horn writes that pursuing an integrated and proprietary approach to developing technologies and controlling how they interact with the school's teachers, physical architecture, and philosophy may be critical. Horn believes that more schools taking a leading "full-stack-up" approach supporting the idea that a start-up builds a complete end-to-end product or service could be the answer. Although most district schools aren't equipped to take this approach, Horn describes two private school networks that are emerging to tackle this challenge.