<p>By binding EA do you mean ED? At some schools ED does give a slight advantage over RD applicants. But, IMO you should not apply to any school ED unless you are 100% positive that it is your top choice and if accepted you will have absolutely no regrets about not seeing if you got into the other schools. Take some time and think about which school is the best fit for you. My D visited her top two choices again in the fall of her senior year and after that she felt certain where to apply ED. If your top choice is Duke or Georgetown, you may be able to apply ED there and EA to Chicago as well.</p>