Sophia upgrades its website with 25,000 free academic tutorials and more
View more Sites of the WeekSophia.org has enhanced its social teaching and learning platform to include more than 25,000 free tutorials on math, science, English, and more—all in an ad-free environment. What’s more, the site has become a key destination for teachers who are looking to “flip” their classrooms, its makers say. Read more with registration.