There has been a significant increase in the availability of digital tools (mainly laptops) in public school systems in the country. Federal level support, increased investments from private industry, and reduced technology price points for the education sector have all contributed to increases in availability. At the same time, however, innovations in educational technology promise to change how teachers deliver instruction and give students greater control over their learning. This Research Brief presents an overview of online learning in K-12 public school systems focusing on its impacts on student outcomes and the role of teachers.