WE LOVE THE GREAT COURSES PLUS!
If you have gifted learners who are at the high school or college level, then I strongly recommend The Great Courses Plus! This is one of our most used programs for our 13 year old who is gifted and working at the college level. He even watches videos when it is not related to school, just because he loves the videos and lectures so much. It is not only great for him, but we have even watched some of the lectures with our younger learners. I even love watching the lectures! There is truly something for everyone. You will not go wrong with Great Courses Plus!
Have fun learning something new!