Code.org — the non-profit promoting the Hour of Code to expand participation in computer science — has released Code Studio, an open-source platform for learning the basics of computer science.  Students and parents are encouraged to sign up to be able to save their progress in online courses such as the 20-hour courses for elementary students, the Fun for Everybody courses, and the General Course for All Ages.  K-8 teachers are encouraged to sign up to use Code Studio for teaching computer science in the classroom.