Hello, im a student nearly 17 years old, i have recently started doing my first class in coursera Introduction to astronomy from Duke university. Do you guys have some interesting lessons to start later? Im intersting in mathematics, physics and computer science, logic and foundations of mathematics. Any suggestions would be interesting. I dont care if the lesson is self paced or not.However i dont have much free time left to do what i want due to school obligations and extracurricular lessons :( i just want to learn some cool stuff that will help me later with my university studies, enrich my CV and generally speaking make me "complete"