Can I submit more than the 2 required math and science test scores? I ended up scoring well on chemistry (780), my other tests are slightly better (800 math 2, 790 physics) but I want to send this too if possible.
Also do they just look at scores or the percentile as well? 790 physics was 83rd percentile but 780 chem was 84th, does that matter at all?
Thanks in advance
Yes
Don’t get caught up with percentiles. It is important to understand that for several subjects, the percentiles are depressed because so few colleges request Subject Tests, that the ones that do are the ultra selective ones. As a result, it is the high achieving kids taking the tests. No AO is sitting on the floor cross-referencing scores with percentiles.
Good luck.
MIT is not super focused on test scores and any scores above about 750 are about the same, I would say. Few admissions officer worries about percentiles, but some admissions offices like U of California campuses, are very number focused and plug test scores and GPA into a formula, you can look up on line. MIT does not use the formula approach to admissions, as far as I know. Its more wholistic.
For MIT, there are boxes like CREATIVITY? FIT? WHAT DOES THIS STUDENT LOVE TO DO?
FIRST GENERATION COLLEGE STUDENT? SPECIAL TALENTS or INTERNATIONAL PRIZES? SCIENCE FAIR WIN?
MIT allows optional maker, music and art portfolios that may help you stand out. MIT female applicants do not submit portfolios as often as male applicants to MIT.
Where did you hear this? It sounds like a good news 
And does first generation college student mean parents didn’t complete any type of post-secondary education or specifically at American institutions?
MIT’s art, music and maker portfolios are optional, and they cannot hurt your MIT application, but they also may not help it a lot. Read about them before taking a lot of time on them. I read on a blog or heard from someone in the MIT Educational Council (volunteer interview team) that girls submit portfolios less often than boys right now.
MIT defines “first generation” as you are the first in your family to attend a four year college. So if your parents attended and graduated from two year colleges, you would still be considered a first generation college student by MIT.
If your parents have less education than a two year college, that also works. If either one of your parents graduated from a four year college, you are not first generation. The country of the college does not matter, as far as I know.
Other universities may define “first generation college student” differently. so ask each college about this.
The Common Application will ask you what colleges your parents attended and what degrees they hold.
MIT does not use the common app but asks the same question.
If your parents went to college overseas you will not be considered first generation by any college.(I believe you asked that earlier – the answer won’t change). In any event as noted above you put in your parents education and each college will decide if you are first generation or not – the standards vary a bit from school to school.