A lot or a little?
Parents need to know that The Great Courses Plus is a collection of several hundred video lectures from university professors from around the world. It's a subscription-based streaming service that works on mobile devices and also on a variety of TV-connected devices like Roku, AppleTV, Amazon Fire TV, and Chromecast. While most of the lectures are geared toward college students, there's an increasing amount of content created exclusively for elementary, middle school, and high school students. Read the developer's privacy policy for details on how your (or your kids') information is collected, used, and shared and any choices you may have in the matter, and note that privacy policies and terms of service frequently change.