I had blogged about them, but for a different reason, also interactive - online turtle graphics: Online turtle graphics in Python from Runestone Interactive:

I had blogged about them, but for a different reason, also interactive - online turtle graphics: Online turtle graphics in Python from Runestone Interactive: https://jugad2.blogspot.com/2013/02/online-turtle-graphics-in-python-from.html?m=0 https://jugad2.blogspot.com/2013/02/online-turtle-graphics-i... Had also mentioned that anyone can host a course there for free.