<p>If you can, take both micro and macro economics at your school. At Columbia, these are combined into one class. Say you only take micro, then you would either have to take macro at another uni in the summer, or take the micro/macro class and repeat some of what you’ve already learned. Instead of biology, I would take chemistry. Also, take the lab section of chem if you can. Take a look at the bulletin, and you’ll see a track of the courses you will need to take at Columbia. Try to get some of those out of the way at you current school. Computer science, calc, writing and comp look good. Art history may count for a non-tech elective, which is also good.</p>