I cannot tell you how wonderful the math courses with Dr. Sellers are. My oldest (14) has always struggled with math, and as a homeschooler, I’ve tried different techniques and curriculums to help him. This is the first time I can tell that a real lightbulb has come on and he’s truly getting it. And I’m finally understanding things that I struggled with in school, too! The way he teaches is just fantastic. I love that he talks in a normal conversational tone, not patronizing or as if he’s teaching children. And he explains everything THOROUGHLY and clearly. He gives you the techniques in detail step by step and gives 2 or 3 examples. Then he gives you a problem to figure out. He goes over that problem in detail just like the others, so that if you do make a mistake, you can see where you went wrong. But so far, neither my son nor I (because I started doing it with him because it’s so great) have made mistakes because by that time we are clear on how to do it. Except one time when I made a dumb counting error lol. Thank you so much, Dr. Sellers and Wondrium. You are turning a teenager and middle aged adult who have both always hated and struggled with math, into interested math scholars!

The GCP is a powerful and effective tool that has provided my entire family members ranging from ages 6-80 with wealth of information from multiple fascinating lectures. I have enjoyed many courses from History to Astrophysics to cooking and more. The lectures are engaging and easy to follow (English is my second language). I appreciate the fact that I can log in from any device (10 in my account) and from anywhere in the wold! I can execute multiple daily tasks while learning. Getting stuck in traffic is no longer a waste of my life as long as I can listen to any of The Great Courses Plus lectures. The only thing I wish can be improve, is the accessibility of the lessons in each Course. It takes too many steps of I want to start from the beginning or play a previously studied lesson. In any case, the fact that one can have access to such incredible amount of knowledge at his/her fingertips is powerful!

I love this app and service. I like that new content is being added and I particularly like the audio-only mode. I will be a subscriber for long time, but have three more (necessary) usability requests and two suggestions. (1) allow users to browse the app while audio programs are playing. Right now, the only way to browse for other content within the app is to stop the program. This does not follow the iOS HIG. Also, please change the player to the native iOS media players. (2) performance improvements, particularly background battery drain. I’m unsure why this app is such a battery hog, even when content is downloaded in the background. (3) for browsing, a better system is needed. I’d suggest filtering options (including one for “percent seen.” The current “Netflix” style of browsing is painful and slow. These are just ideas, but I think they would be awesome to add after the usability problems have been addressed! (4) note-taking during content and live closed captioning should be added and integrated for future reference, given the service’s educational focus, this would be a boon for studying or looking back on past materials. (5) ratings and reviews for content, simple thumbs up, thumbs down. Would help in finding quality content when there is overlap in available programming.

Sometimes it doesn’t sync properly across devices, starting further back in a lecture than where you left off - and sometimes you can’t even fast forward to where you were; it just keeps jumping back, forcing you to re-watch parts you’ve already heard. You can’t download just the audio, only video, which is not too convenient if you are listening while driving unless you want to get a ticket for watching video while driving, because you can’t switch the downloaded video to audio only. Exit the app and when you go back you have to navigate back manually to where you left off, it does not automatically show the lecture you were on and offer to continue. It doesn’t even have the course you are on on the front page when the app opens. If you exit the app while watching a video to, say, read a message or google something, it stops playing; you have to manually switch to audio only then exit the app to keep listening. So, several frustrating clunky inconveniences or bugs, but I’m enjoying the content of my first course.