Charter schools in the U.S

Watch the following video about charter schools in the U.S.: https://www.youtube.com/watch?v=l_htSPGAY7I
Then watch the video about the education system in South Africa: https://www.youtube.com/watch?v=25ll4iB74a4
What are some of the challenges that are in both educational systems? What are the various solutions people have offered and how are they working out? What are the challenges that are unique to South Africa and why do you think that it is unique?